absorption trap acid bottles - PDF Free Download

absorption trap Operation: Absorption of noxious acid fumes and gasses without mechanical fume extraction. It is usually used in conjunction with Kjeldahl digestions and Friedel-Craft reactions An apparatus consisting of a bulb trap on top of which is fitted a cylinder comprising of a porosity 1 sintered disc, a drip tube and ground cones and sockets on each component Alternate socket and cone sizes The assembled trap is fitted onto a Kjeldahl flask and the bulb is half filled with a 10% sodium hydroxide solution. Fumes that are evolved force the solution into the cylinder until the level drops below the drip tube in the bulb. Fumes then pass up through the sintered disc which assists absorption by fine division of the bubbles Blocked pores of the sintered disc could cause the apparatus to blow apart CAPACITY ml JOINTS CATALOGUE # 250 B24 24068365 acid bottles Storage of acids and other corrosive liquids Soda-lime glass A bottle with a ground socket neck and penny-head stopper A ground in cap fits over the neck to give added protection against leakage of fumes CAPACITY ml CATALOGUE # 500 052127544 1000 052127554 552

adapters - apparatus joint manipulation Connecting dissimilar sized ground joints in apparatus assemblies Addition of spring hooks Keck clip for clamping the joints High vacuum grease Holding springs CONICAL/SPHERICAL ADAPTERS Specific usage: Connecting conical and spherical joints The cone/cup adapter has a cup at the top and cone at the bottom The socket/ball adapter has a socket at the top and ball at the bottom CODE CONICAL JOINTS SPHERICAL JOINTS CATALOGUE # CC3/35 B24 cone S35 cup 242065 SB3/35 B24 socket S35 ball 242075 EXPANSION AND REDUCTION CONICAL ADAPTERS Specific usage: Expand from socket to cone Reduce from socket to cone The expansion adapter has a large socket at the top and small cone at the bottom The reduction adapter has a small socket at the top and large cone at the bottom CODE JOINTS CATALOGUE # CODE JOINTS CATALOGUE # cone to socket cone to socket XA10 B10 to B14 2420831 DA01 B14 to B10 2420913 XA21 B14 to B19 2420843 DA12 B19 to B14 2420934 XA31 B14 to B24 2420853 DA13 B24 to B14 2420935 XA41 B14 to B29 2420863 DA14 B29 to B14 2420936 XA32 B19 to B24 2420854 - B24 to B10 2420941 XA42 B19 to B29 2420864 DA23 B24 to B19 2420945 XA52 B19 to B34 2420874 DA24 B29 to B19 5420946 XA43 B24 to B29 2420865 DA34 B29 to B24 2420956 XA53 B24 to B34 2420875 DA25 B34 to B19 2420947 XA54 B29 to B24 2420876 DA35 B34 to B24 2420957 - B29 to B34 2420884 DA45 B34 to B29 2420967 XA64 B29 to B40 2420886 DA48 B50 to B29 2420960 XA74 B29 to B45 2420896 adapters - flexible joint manipulation Usage: Joining misaligned conical joints in apparatus assemblies PTFE Bellows tube with a cone on one end and a socket on the other end JOINTS CATALOGUE # B24 1K1047 B29 1K1048 B34 1K1049 553

adapters - multiple connection Multiple connection of ground joints in apparatus assemblies Addition of spring hooks Keck clip for clamping the joints High vacuum grease Holding springs The adapter with parallel necks has two sockets at the top and a cone at the bottom The adapter with two necks, one at 45 º, has two sockets at the top and a cone at the bottom The adapter with two necks, one at 15 º, has two sockets at the top and a cone, with a drip-tip, at the bottom The adapter with three necks has two vertical and one at 45 º with sockets at the top and a cone at the bottom TYPE CODE JOINTS CATALOGUE # 2 necks parallel MA1/00 B10 2422411 MA1/11 B14 2422433 MA1/2 B19 2422444 MA1/3 B19/B24 2422445 - B19/B29 2422446 MA1/33 B24 2422455 - B24/B29 2422456 MA1/44 B29 2422466 2 necks, 1 at 45 0 MA2/2 B19 2422544 MA2/3 B19/B24 2422545 2 necks, 1 at 15 0 RA4/11 B14 2422633 RA4/22 B19 2422644 RA4/23 B19/B24 2422645 - B24/B29 2422656 3 necks, 1 at 45 0 MA4/23 2422744 - B24 2422755 - B29 2422766 adapters - pourers Facilitate pouring from ground neck bottles and flasks Ground cone fitted with a pouring spout Addition of hooks to hold springs Keck clip for clamping the joints High vacuum grease Holding springs NECK mm CATALOGUE # B14 240003 B19 240004 B24 240005 B29 240006 554

adapters - receivers VERTICAL DELIVERY TUBE Specific usage: BENDS Specific usage: FEEDERS Specific usage: Directing delivery and distribution of end product from reactions in apparatus assemblies Addition of hooks to hold springs Keck clip for clamping the joints High vacuum grease Holding springs In conjunction with a distribution chamber to avoid having to interrupt a reaction when a receiving vessel becomes full A socket with a cone underneath and a sideways drip tip Usually at the delivery end of a condenser used angled in an assembly for distributing into a flask. An optional tube prevents vacuum build up A bent tube with a socket at one end and a skirted cone at the other Delivery into vessels allowing receiving vessels to be removed without interruption of reactions with slow delivery A socket with a straight or bent delivery tube TYPE CODE JOINTS CATALOGUE # Vertical delivery RA11/2 B19 2421044 Bend RA9/11 B14 2423033 RA9/22 B19 2423044 RA9/23 B19/B24 2423045 RA9/33 B24 2423055 RA9/44 B29 2423066 Short stem bent feeder RA1/01 B14 2423213 RA1/02 B19 2423214 RA1/03 B24 2423215 RA1/04 B29 2423216 Long stem bent feeder RA1/11 B14 2423223 RA1/12 B19 2423224 RA1/13 B24 2423225 RA1/14 B29 2423226 Short stem feeder - B14 2423313 - B19 2423314 - B24 2423315 - B29 2423316 Long stem feeder - B14 2423413 RA1/22 B19 2423414 RA1/23 B24 2423415 - B29 2423416 555

adapters - stopcocks Connection of stopcocks to ground joints in apparatus assemblies Stopcocks with conical jointed, and/or tubing connection, inlets and outlets Addition of hooks to hold springs Screwthread tubing connector Alternate joints Keck clip for clamping the joints High vacuum grease Holding springs TYPE CODE JOINTS CATALOGUE # Cone and socket EF6T/55 B24 242155 Cone and socket MF/11/1B B14 242163 Cone and socket MF/11/2B B19 242164 Cone and tubing MF/11/3B B24 242165 Cone and tubing MF/11/4B B29 242166 Cone and tubing MF/11/5B B34 242167 Socket and tubing MF14/2 B19 24217 Distillate FC15/2 B19 24218 Vacuum/cone TF6/24/2 B19 24219 adapters - thermometer Introduction of thermometers into apparatus assemblies Cone with thermometer receiving inlet. The insertion and swan-neck adapters have GL14 screw threads for receiving standard width thermometers Addition of hooks to hold springs Alternate joints Keck clip for clamping the joints Thermometer Screwcap for thermometer High vacuum grease Holding springs TYPE CODE JOINTS CATALOGUE # Insertion ST51/13 B14 cone 240273 ST52/13 B19 cone 240274 ST53/13 B24 cone 240275 ST54/13 B29 cone 240276 Swan-neck MA6/11 B14 socket & cone 2422833 MA6/22 B19 socket & cone 2422844 MA6/23 B19 socket, B24 cone 2422845 MA6/33 B24 socket & cone 2422855 Pocket SH4A B14 cone 243153 556

adapters - tubing Receiving and distribution of end product from reactions A cone with or without a socket and a tubing connection olive Alternative screw thread tubing connection Addition of hooks to hold springs Keck clip for clamping the joints Springs High vacuum grease CODE JOINTS CATALOGUE # MF10/1B B14 cone 242123 MF10/2B B19 cone 242124 MF10/3B B24 cone 242125 MF10/4B B29 cone 242126 MF10/5B B34 cone 242127 MF18/2 B19 cone & socket 242144 MF18/33 B24 cone & socket 242145 MF18/44 B29 cone & socket 242146 aneroid barometer Usage: Measuring atmospheric pressure Wooden case Glass front Stainless steel dial Setting screw CATALOGUE # AB001 arsenic determination set Usage: Components: Operation: Determination of arsenic and antimony Absorption tube 100ml Erlenmeyer flask Alternate size joints Addition of hooks to hold springs The apparatus is designed for the estimation of arsenic by the method that uses the formation of a complex between arsine silver diethyldithiocarbamate with subsequent measurement at 538 nanometers. Arsine is liberated in the flask and reacts with the reagent, that is placed in the limb of the U-tube JOINTS CATALOGUE # B24 ZGA010001 557

aspirators Usage: Storage and dispensing of liquids. Soda-lime glass Polyethylene Screwcap Spindle valve Stopper Stopcock Carry handles Stopcock BORO-SILICATE GLASS SODA-LIME GLASS POLYETHYLENE STOPPERED SCREWCAP CAPACITY litres CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE #.5 2470144 1 2470154 2470354 2 2470163 2470363 05769203 5 2470173 052470373 05769204 1K1660 10 2470186 052470386 1K1662 20 2470191 25 1K1664 50 1K1666 SPARE STOPCOCKS GLASS KEY PTFE KEY SPINDLE VALVE PLASTIC NECK CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # B19 cone 241484G 241484T 241482V B24 cone 241486G 241486T 241481V B29 cone 241487G 241487T 241480V GL32 4mm bore 2414703 GL32 8mm bore 052414704 ¾" BSP thread 1K375 558

beakers - glass Usage: Mixing and boiling of liquids. The tall form is usually used in a water or sand bath Graduations Lipped rim Watch glass for cover Brush Stirring rods Magnetic stirrer bars Tongs SQUAT TALL spout TALL no spout CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 5 0521106070 10 0521106080 25 0521106140 50 0521106170 0521116170 100 0521106240 0521116240 052111724 150 0521106290 0521116290 250 0521106360 0521116360 052111736 400 0521106410 0521116410 600 0521106480 0521116480 052111748 800 0521106530 0521116530 1000 0521106540 0521116540 2000 0521106630 0521116630 3000 0521106680 0521116680 5000 0521106730 559

beakers - glass, special purpose HEAVY WALL Specific usage: JACKETED Specific usage: Specific accessory: PHILIPS Specific usage: Watch glass for cover Brush Stirring rods Magnetic stirrer bars Tongs Boiling and mixing of very corrosive or hot liquids Extra thick glass Graduations Straight rim Spout Maintaining liquids at a constant temperature Rimless tall form beaker inside a closed jacket with standard 9mm water inlet and outlet tubing connection olives Alternate screw thread tubing connections Screw thread tubing connectors Reduction of evaporation due to the smaller surface area for the volume Conical shape Spout Lipped rim HEAVY WALL JACKETED PHILIPS CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 100 0521131240 2401424 150 0521131290 0521141290 250 0521131360 2401436 0521141360 500 0521131440 0521141440 600 2401448 1000 0521131540 2000 0521131630 5000 0521131730 beakers - plastic Plastic Spout Lipped rim Graduations Watch glass for cover Brush Stirring rods Magnetic stirrer bars Tongs A 250ml beaker is available in PFA POLYPROPYLENE PMA (TPX) PTFE PFA CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 25 1K1801 1K1541 1K1534 50 1K1802 1K1542 1K717 1K1535 100 1K1803 1K1543 1K718 1K1536 150 06609-081 250 1K1805 1K1544 1K720 1K1537 500 1K1806 1K1545 1K721 1K1538 600 06612081 1000 1K1808 1K1546 1K723 1K1539 2000 1K1809 1K1547 560

beehive shelf Operation: Supporting gas jars in apparatus assemblies for the collection of lighter than air gasses Porcelain The bee hive shelf is usually placed in a trough of water. A bent glass tube from the gas generating apparatus is led under the shelf through the arch. The gas bubbles upwards through the hole for collection SIZE mm CATALOGUE # 40 x 100 0600420 bell jar Collecting gasses from a reaction Soda-lime-glass Bell shaped vessel with ground neck and flat flange ground base Penny-head stopper CAPACITY ml CATALOGUE # 2000 BJ250150 bench blotter Usage: Properties: Fluid barrier for laboratory benches; to absorb spillages Blotting paper Super absorbent Impermeable polyethylene backing Ashes readily on incineration AVAILABILITY SIZE m CATALOGUE # Sheet 4.6 x.5 02-2000-100 Roll 4.6 x 57 02-2000-050 561

bio steam chambers Usage: Reservoir flask in essential oil distillation apparatus assemblies B34 socket on single neck chamber and B34 angled neck with B24 centre neck on 2 neck chamber B24 cone and short Vigreux column above the cone Alternate cone and socket/s. Addition of hooks to hold springs NECKS CAPACITY ml CATALOGUE # 1 2000 240616 2 2000 240626 boiling flasks - ground necks Boiling of liquids in apparatus assemblies. They are usually heated by heating mantles, liquid baths or burners. Round bottom flasks can be used under vacuum, but only if the surface of the glass is undamaged Spherical vessel with round or flat bottom Ground neck to receive manipulative conical joints Retaining hooks for springs Stopper Magnetic stirrer bar ROUND BOTTOM FLAT BOTTOM CAPACITY ml NECK mm CATALOGUE # CATALOGUE # 25 B14 2417012 2417112 50 B14 2417013 2417113 50 B19 2417014 2417114 50 B24 2417015 2417115 100 B14 2417024 2417123 100 B19 2417025 2417124 100 B24 2417026 2417126 250 B19 2417034 2417134 250 B24 2417036 2417136 250 B29 2417037 2417137 500 B24 2417044 2417144 500 B29 2417046 2417146 500 B34 2417047 2417147 1000 B24 2417054 2417154 1000 B29 2417056 2417156 1000 B34 2417057 2417157 2000 B29 2417063 2417163 2000 B34 2417067 2417167 562

boiling flasks - straight necks Boiling of liquids in distillation, reaction, extraction, freeze drying etc. They are usually heated by heating mantles, liquid baths or burners. Round bottom flasks can be used under vacuum, but only if the surface of the glass is undamaged (bruising, scratching, etc.) Round or flat bottomed spherical vessel Narrow or wide neck with lipped rim Addition of side arm for septum Retaining hooks for springs Rubber bung Magnetic stirrer bar Support for round bottom flask Do not use flat bottom flasks under pressure ROUND BOTTOM FLAT BOTTOM CAPACITY ml NECK mm CATALOGUE # CATALOGUE # NARROW NECK 50 34 0521721170 0521711170 100 22 0521721240 0521711240 250 34 0521721360 0521711360 500 34 0521721440 0521711440 1000 42 0521721540 0521711540 2000 42 0521721640 0521711640 5000 50 0521721730 10000 65 0521721860 WIDE NECK 50 35 0521741170 0521731170 100 34 0521741240 0521731240 250 50 0521741360 0521731360 500 50 0521741440 0521731440 1000 50 0521741540 0521731540 2000 72 0521741640 0521731640 SUPPORT 1B38950 boiling rod Stirring of boiling liquids Rod with tubular end SIZE mm CATALOGUE # 6 x 250 BR2506 bosshead Clamping scaffold components at 90 º Stainless steel Moulded casing with cut-outs at 90 º to each other Thumb screws Retort stand CATALOGUE # 08080310 563

bottle top dispensers Dispensing of liquids from bottles PTFE, PFA, FEP and borosilicate glass Specifications: Conforms to DIN 12600 Accuracy <+ 0.5% (Nominal volume 2.5ml <+0.6%) Coefficient of variation < 0.1% Completely autoclavable at 121 º C Box contents: Dispenser Telescopic intake tube Three adapters Instruction manual Certificate of conformity Mounting tool Recirculation valve and media-specific recalibration Positive displacement plunger to minimise crystallisation of liquids and clogging with 360º swivel head The Genius and Simplex have variable volume; the Simple Fix has fixed volume. The Genius has a recirculation valve and media-specific recalibration Reservoir bottle of choice Adapter for ground neck bottle GL thread adapter CAPACITY ml & GL THREAD & GENIUS SIMPLEX SIMPLEX FIX GRADUATION ml ADAPTER CATALOGUE # CATALOGUE # CATALOGUE # 0.1-2.5 / 0.05 32 - GL 28, 40, 45 1605503 1601503 0.5-5 / 0.1 32 - GL 28, 40, 45 1605504 1601504 1.0-10 / 0.2 32 - GL 28, 40, 45 1605505 1601505 1602502 2.5-25 / 0.5 45 - GL 32, 38, S 40 1605506 1601506 5-50 / 1 45 - GL 32, 38, S 40 1605507 1601507 1602504 10-100 / 2 45 - GL 32, 38, S 40 1605508 1601508 1602505 1,0-10ml GL32 - GL28, 40, 45 1606515 For hydrofluoric acid (HF) MICRO PTFE, FEP, ETFE, PFA, borosilicate glass, platinum/iridium. Piccolo 1 GL 28 screwthread. 360 º swivel head Glass dispensing tip Piccolo 2 As for Piccolo 1 Switchable head for choice between two volumes Not suited, among other chemicals, for fuming acids and carbon disulphide MODEL CAPACITY ml CATALOGUE # PICCOLO 1 100 1610501 250 1610503 500 1610504 1000 1610506 PICCOLO 2 100/250 1611503 500/1000 1611506 1000/2000 1611508 brewer's flask Determination of malts in the analysis of brewer's extracts Straight neck Beaded rim Modified volumetric flask Marks at 500ml and 515ml Ground neck of choice Rubber bung Glass or plastic stopper for ground neck Cleaning brush CAPACITY ml CATALOGUE # 500 241114 brushes Cleaning laboratory ware Nylon bristles on twisted galvanised wire TYPE BRUSH SIZE mm CATALOGUE # Beaker/bottle 50 x 135 08086301 Beaker/bottle, black 50 x 140 08020200 Beaker/bottle, red 50 x 140 08020202 Beaker/bottle, blue 50 x 140 08020203 Beaker/bottle, green 50 x 140 08020204 Beaker/bottle, yellow 50 x 140 08020205 Burette 12 x 90 08086304 Swivel head for flasks 45 x 330 1B17068 Test tube 15 x 90 08072950 564

buchner flasks Alternate names: Filter flasks, suction flask, vacuum flask Vacuum filtration and drawing off liquids. Used usually in conjunction with a Buchner funnel or filter (Gooch) crucible Heavy duty boro-silicate glass = Guko - EPDM rubber Conical or bottle shape(3 & 5 litre) Tubing connection olive Straight neck Beaded rim Keck tubing connector assembly Screwthread tubing connector Side-arm socket Guko Tubing Suction pump Rubber bung Buchner funnel FILTECH filter paper Cleaning brush Filter crucible CAPACITY ml NECK mm & GUKO CATALOGUE # 100 24-2 or 3 052120124 250 36-4 or 5 052120136 500 36-4 or 5 052120144 1000 45-5 052120154 2000 60-6 or 7 052120163 3000 60-6 or 7 052119168 5000 70-7 or 8 052119173 SIZE mm CATALOGUE # GUKO No. 2 16 x 29 082920217 Operation: No. 3 22 x 36 082920223 A Buchner funnel, filter funnel with sintered disc or filter head is fitted in the flask No. 4 27 x 44 082920227 neck, using a guko conical rubber gasket, ensuring that the stem of the funnel No. 5 33 x 53 082920232 extends beyond the opening of the suction connection. Vacuum tubing is No. 6 43 x 63 082920236 attached to the tubing olive or connection. A vacuum is then created in the flask No. 7 52 x 73 082920239 by sucking air from the flask using a water jet pump or vacuum pump. Filtration is No. 8 61 x 84 082920243 accelerated by the suction created inside the flask. Safety precaution: A tubulature, screwthread tubing connector or a Keck tubing connector assembly is recommended 565

buchner funnels Vacuum filtration, generally with a Buchner flask Porcelain, polypropylene, boro-silicate glass Conical shape with a perforated base. The plastic funnel has a detachable top FILTECH filter paper Guko (See buchner flasks) BORO-SILICATE APPROXIMATE PORCELAIN POLYPROPYLENE GLASS CAPACITY ml FILTER PAPER cm INNER DIAM. mm CATALOGUE # CATALOGUE # CATALOGUE # 50 4.7 45 07127C0a 130 7 70 07127C2 1K439 052134128 220 9 90 1K441 052134134 500 11 106 1K442 052134144 580 11 110 07127C3 795 12.5 125 07127C4 1250 15 150 07127C4a 4300 24 240 07127C6 5800 27 270 07127C6a 10600 32 320 07127C8 BUCHNER FUNNEL FILTRATION TECHNIQUES After completion of a reaction, filtration of a mixture will often be necessary to either isolate a solid which has separated out or remove insoluble impurities or reactants, in which case the desired material remains in solution. COLD SOLUTIONS When substantial quantities of a solid are to be filtered from suspension in a liquid, a Buchner funnel of convenient size is employed. Suction causes rapid filtration and results in a more complete removal of the base liquid than in normal atmospheric filtration. Select a filter paper of such size that it covers the entire perforated plate without being folded up against the sides of the funnel (it should be slightly smaller than the plate). Moisten the filter paper with the liquid to be filtered, place it on the perforated plate and apply the suction. The filter paper will adhere firmly to, and completely cover, the plate of the funnel thereby preventing any solid matter from passing underneath the filter paper and into the flask. Pour as much of the liquid into the funnel and allow it to be filtered before transferring the residual slurry into the funnel for filtration. This method allows quicker filtration than if the mixture had been stirred to bring more particles into suspension and pouring it directly unto the funnel. Initial gentle suction leads to more effective filtration than powerful suction which could cause finer particles of solid to be drawn into the pores of the filter paper reducing the rate of filtration. After completion of a reaction, filtration of a mixture will often be necessary to either isolate a solid which has separated out or remove insoluble impurities or reactants, in which case the desired material remains in solution. Any solid remaining in the reaction flask can be easily transferred to the filter funnel by rinsing with a bit of the filtrate and stirring well to remove any solids adhering to the sides of the reaction flask. Be sure to disconnect the pump from the Buchner flask before switching off the pump otherwise suck back will occur and ruin any reaction products in the filtrate. HOT SOLUTIONS Pre-heat the Buchner funnel and use a close-grained, or glass microfibre, filter paper. 566

burettes Measured and accurate titration of liquids Specifications: Class A. Calibrated 0.1ml to deliver at a reference temperature of 20ºC Graduated volumetric tube with choice of black or white enamel graduations on standard burettes Stopcock with 2-2.5mm bore glass key or PTFE key or spindle valve Intermediate stopcock with key of choice and spindle valve on the Bang pattern micro burette Schellbach strip (standard with conformity certified burettes) Amberise Double bore stopcock with key of choice Lateral valve GLASS KEY PTFE KEY SPINDLE VALVE CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # Standard 10 05721001211 0561346512 05721314 25 05721002211 0561346513 05722314 50 05721003211 0561346515 05723314 100 05721004211 0561346516 05724314 10 721121 616512 05721315 25 721221 616513 05722315 50 721321 616515 05723315 Conformity certified 25 05314170 05314370 50 05314175 05314375 Micro 2 24214G 24214T 24214S 5 24217G 24217T 24217S With intermediate 2 24224G 24224T 24224S stopcock (Bang pattern) 5 24227G 24227T 24227S Dispensing (Class B) 250 24313G 24313T 24313S 500 24413G 24413T 24413S 1000 24513G 24513T 24513S PLASTIC PVC/PMP/FEP CAPACITY ml CATALOGUE # 25 105399 50 105199 ACCESSORIES TYPE CATALOGUE # Plastic single 1K139 Plastic double 1K140 Metal, 3-point grip 08086303 Metal, 4-point grip 08080352 Retort stand 08080302 Brush 08086304 567

burettes - automated filling - daffert Measured and accurate titration of liquids with automated filling Specifications: Class A. 50ml. Calibrated 0.1ml to deliver at a reference temperature of 20ºC Operation: Graduated volumetric tube with choice of black or white enamel graduations Double bore stopcock Filling cut-out cup Schellbach strip Tubing Aspirator bottle for reservoir Place an aspirator bottle above the burette and attach it to the stopcock side-arm. Attach tubing to the cup side-arm and lead it into a beaker at bench level. Turn the stopcock so that the flow will be through the stopcock side-arm. Fill the aspirator and open the aspirator tap. Allow the burette to fill until the liquid overflows into the beaker. Close the burette stopcock. The liquid level will automatically be at zero. GLASS KEY PTFE KEY CATALOGUE # CATALOGUE # 2431717G 2431717T burettes - automated filling - digital Specifications: Box contents: Continuous titration of liquids from bottles PTFE/PFA/ FEP and borosilicate glass Conforms to DIN 12600. Accuracy <+ 0.2%. Coefficient of variation < 0.1%. Dispensing range: 0.01ml - 999.9ml. 25ml dispenses 2.5ml and 50ml dispenses 5ml Burette head Telescopic intake tube Three adapters Instruction manual Conformity certificate Two batteries Recirculation valve Calibration buttons Digital display of titrated volume 360 º swivel head Adjustable titrating and intake tubes Thread and adapter - 45 - GL 32, 38, S 40 Reservoir bottle or flask Adapter for drying tube and filter GL/ground neck adapter CAPACITY ml CATALOGUE # 25 1620506 50 1620507 568

laboratory burettes - automated ware filling, dr. schilling Specifications: Operation: Measured and accurate titration of liquids through a directional spout and automatic filling from a reservoir or plastic burette and plastic auxiliary parts Class B Graduated Schellbach volumetric tube with blue enamel graduations Push-button release valve with directional flow spout Discharge feeder tubing 1000ml reservoir bottle with support base Fill the reservoir bottle with the titrating liquid and gently squeeze the bottle to fill the burette. Excess liquid will drain back into the reservoir GLASS TUBE PLASTIC TUBE CAPACITY ml CATALOGUE # CATALOGUE # 10 0572410112 15 72410612 25 0572410712 06106399 50 0572410312 06106499 burettes - automated filling, pellet Measured and accurate titration of liquids with automated filling to zero Specifications: Class A. 50ml. Calibrated 0.1ml to deliver at a reference temperature of 20ºC Operation: Graduated volumetric tube with black or white enamel graduations Over flow bulb at top of tube B29 cone at bottom of tube Side-arm spindle valve Optional intermediate stopcock Tubing connector Tubing Reservoir bottle Insert the cone of the burette into the neck of the reservoir bottle. Attach the tube of the filler bulb to the tubing connector. Place your thumb over the hole above the tubing connector. Pump the ball to fill the burette. Release the pressure to allow excess liquid to siphon back into the reservoir and set the level in the burette to zero For burette with intermediate stopcock: Empty the burette by opening the intermediate stopcock BLOW BALL FILLER RESERVOIR BOTTLE Natural red rubber Soda-lime glass Rubber tube 2000ml Blow ball B29 neck CATALOGUE # CATALOGUE # 06200C 0524357261 Release valve 569

burners Heating apparatus in the laboratory CATALOGUE # 08086100 BUNSEN Aluminium, brass and steel Powder coated base Flame tube Hose connection Flame-adjust swivel Tubing SPIRIT CATALOGUE # Soda-lime glass 08086200 Container Polypropylene cap Porcelain wick holder Spirit fuel Spare wicks caps burettes - culture - automated vessels filling, pellet laboratory ware Closing culture bottles CATALOGUE # 2144118 Dimpled top 33mm diameter neck Collar caps - push-on Closing rimless culture bottles, tubes and flasks CATALOGUE # 082901324 Blue anodised aluminium Inner spring grip 38mm diameter KAPSENBERG CAPS Aluminium SIZE mm CATALOGUE # 16 082901009 Inner spring grip 18 082901011 16 and 18mm diameter Finger grip Release valve 570

caps - screw-on Closing laboratory bottles and screw thread tubes Red - ETFE, others - polypropylene Silicone rubber seals THREAD GL14 GL18 GL25 GL32 GL45 COLOUR CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # Blue 082923913 082923919 082923928 Red 082924008 082924011 082924013 082924019 082924028 White 082923913 082933919 082933920 Yellow 0829338280 Green 0829338286 Grey 0829338288 Red with hole 082922705 082922706 082922709 082922708 082922710 SEALS WITH HOLE SIZE/HOLE mm CATALOGUE # CATALOGUE # 12/6 082924605 082923406 16/6 082924606 082923506 22/8 082924609 082923708 29/10 082924608 082923610 29/12 082923612 42/26 082924610 082923826 DG SAFETY WASTE CAPS Specific usage: Safely collecting liquid laboratory waste Drip-free collection of aggressive liquids CATALOGUE # Free rotation to enable container change 1168401 Available with 1, 2 or 3 ports 1168402 1168413 Charcoal filters to prevent gas emissions Stopcock to prevent tube drainage and air trapping Thread adapters Also available for ground neck vessels TAMPER-EVIDENT SCREWCAP Specific usage: Safely close bottles and easily identify any tampering CATALOGUE # 1017526 Polypropylene Operation: Can be used with all laboratory bottles having a GL45 thread Autoclavable and temperature resistant up to +140 C The cap is screwed tightly onto the bottle and after a soft 'click' the plastic ring is fixed on the bottle neck. When the cap is opened for the first time, the perforation of the plastic ring is broken thus showing that the bottle has been opened Pack size: 10 After the perforation of the plastic ring is broker, the cap may of course still be used as and "ordinary" screw cap 571

capsules Ashing of samples SIZE mm CATALOGUE # ROUND 48 x 15 2016 Silica 54 x 15 2017 69 x 15 2018 56 x 28 2019 78 x 18 2021 75 x 28 2022 87 x 28 2023 RECTANGULAR 60 x 28 x 12 2024 68 x 39 x 12 2025 52 x 42 x 18 2026 78 x 56 x 28 2027 centrifuge tubes Specifications: DIN 58970 (Part 2) for a maximum acceleration of 4000pm and contents with a maximum density of 1.2g/ml Rimless Flame polished edge ROUND BOTTOM CONICAL BOTTOM CAPACITY ml CATALOGUE # CATALOGUE # 6 052160110 12 052160111 052426309 25 052160114 052161114 50 052160117 052161117 70 ZGT101 80 052160124 80 052160126 250 052160136 ROUND BOTTOM Polypropylene Lipped rim CAPACITY ml SIZE mm CATALOGUE # 7 100x12 1K302 16 100x18 1K303 31 95x24 1K305 48 100x30 1K306 70 100x35 1K307 110 120x40 1K308 CONICAL BOTTOM POLYPROPYLENE POLYPROPYLENE PMP (TPX) GRADUATED GRADUATED CAPACITY ml SIZE mm CATALOGUE # CATALOGUE # CATALOGUE # 10 108x16 1K300 1K2300 1K1387 15 120x18 1K301 1K2302 1K1388 572

ceran heating plate Usage: On a quadruped for protection, even distribution of heat and avoidance of soot A better alternative to gauze wire supports with problem-free cleaning Specifications: Plate: Glass ceramic Holder & quadruped: Chrome/nickel steel Application range from -200 º C to +700 º C Extremely low expansion Very resistant to thermal shock Plate holder Bosshead Quadruped. Retort stand. ITEM CATALOGUE # 135x135mm plate 052382153 Holder 082907853 Quadruped 082907753 chromatography Usage: Liquid/solid column chromatography Stopcocks with glass keys Ground sockets and cones Por. 0 sintered disc 24026 - GL18 screwcap Alternate sockets and cones PTFE-key stopcock Built in 250ml reservoir Spindle valve Tamping rod Flask or bottle for spray head Solvents Packing adsorbents, i.e. aluminium oxide Dropping funnels can be used as solvent reservoirs TYPE CATALOGUE # 30ml, P1 filter disc 24030 Socket & cone 24031 Stopcock and socket 24032 Stopcock, sock and cone 24033 Adjustable spray head 24026 Column holder 18202 573

claisen flasks Usage: Distillation apparatus assemblies Pear shape Two vertical B14 sockets for thermometers, dropping funnels etc. B14 side cone for condenser, receiver etc. Alternate sockets and cone CODE CAPACITY ml CATALOGUE # MD3/25 25 2419914 MD3/50 50 2419917 MD3/100 100 2419924 claisen-vigreux flasks Usage: Distillation fractionating apparatus assemblies Pear shape Two vertical B14 sockets for thermometers, dropping funnels etc. Built-in fractionating column B14side cone for condenser, receiver etc. Alternate size sockets and cone CODE CAPACITY ml CATALOGUE # MD4/25 25 2420114 MD4/50 50 2420117 MD4/100 100 2420124 574

clamps and clips Usage: Clamping and holding of laboratory apparatus Stainless steel SIZE NS mm CATALOGUE # 13 2863330 BALLCUP CLAMP 19 2863334 Tightening screw 29 2863338 Spring loaded 35 2863342 EXPANDING RETORT CLAMPS CATALOGUE # Thumb screw 3-JAW 08080350 Cork- or plastic-lined jaws 4-JAW 08080315 Bosshead (required) QUICK RELEASE FLAT-FLANGE CLAMP SIZE mm CATALOGUE # Screw fastening 60 082907134 Release lever 100 082907146 Three retaining clips TUBING CLAMPS: MAXIMUM TUBING HOFFMAN HOFFMAN DIAMETER mm CATALOGUE # Thumb screw clamp 22 08086902 Hinged bottom bar MOHR MAXIMUM TUBING MOHR Squeeze to open DIAMETER mm CATALOGUE # Spring-loaded 22 86910 575

clamps and clips for glass joints Usage: Clamping and holding of laboratory apparatus POM KECK for conical joints Operation: Locate the wide end of the clip with the wide end of the joint and snap the clip over the cone and socket to hold them together COLOUR TO FIT JOINT CATALOGUE # SET B10 to B45 062903107 Turquoise B10 062903112 Violet B12 062903111 Yellow B14 062903114 Blue B19 062903119 Green B24 062903124 Red B29 062903129 Orange B34 062903134 Yellow B40 062903140 Brown B45 062903145 KECK for spherical joints COLOUR TO FIT KS JOINT CATALOGUE # Violet 13/2 2863405 Light blue 19/9 2863406 Dark red 29/12 2863408 Orange 35/20 2863409 clevenger trap Usage: Distillation apparatus assemblies CATALOGUE # 24243 Built-in Liebig condenser Standard 9mm tubing olives Glass-key stopcocks Ground cones and sockets of choice Stopcock with PTFE-key Spindle valve Screwthread tubing connectors. Tubing Keck clips 576

cold traps VACUUM TRAP Specific usage: Operation: CONDENSATION TRAP Trapping of condensation and prevention of it escaping into the system In vacuum apparatus assemblies to prevent entrainment of volatile materials from damaging pumps etc. Usually used in a train Ground sockets of choice. Jacketed conical tube Load the vessel with a suitable refrigerant such as dry ice. Volatile materials passing through the assembly freeze onto the cold surface 90 º bend U-bend with spindle valve to easily drain off contaminants CATALOGUE # 24069 Bulb containing hook shaped tube Ground cone of choice CATALOGUE # 24070 IMMERSION TRAP Specific usage: In vacuum apparatus assemblies to prevent corrosive vapours etc. May also be used as an absorption trap Kjeldahl digestions from damaging pumps Tube CATALOGUE # Ground cone and socket of choice 24071 Operation: Immerse the trap into a Dewar vessel containing a suitable refrigerent such as dry ice. Volatile materials passing through the assembly freeze onto the cold surface 577

combustion boats Combustion and weighing of dry samples Porcelain and silica Finger grips PORCELAIN LENGTH mm WIDTH mm CATALOGUE # 72 11 258 90 12 306 100 12 307 130 20 309 SILICA LENGTH mm WIDTH mm CATALOGUE # 50 9 72375 78 11 72380 103 12 72382 combustion tube Combustion of small amounts of solids. Can also be used as a drying tube or screwthread connector in apparatus assemblies Screwcap with hole Threaded ends Keep direct heat way from caps. Avoid temperatures above 500ºC as glass could distort LENGTH mm DIAMETER mm CATALOGUE # 230 22 24193 condensers - coil COIL-DISTILLATE Specific features: Reflux or distillation applications in apparatus assemblies Two 9mm tubing olives Ground cone and optional socket Alternate effective lengths to suit requirements. Alternate screwthread tubing connection with connector for safety and convenience Alternate size sockets and cones. Distillate coil Coolant jacket Equal size joints CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm 2425371 B24 300 2425305 2425372 B29 300 2425306 578

condensers - coil DALIN Specific features: Operation: Coolant coil Distillate column Flooding protector Equal size joints The bypass prevents flooding in the condenser CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm QC-4080 B24 300 2426405 DIMROTH Specific usage: Specific features: For dry ice or solid coolants Coolant coil Distillate column Water inlet and outlet both at the top Equal size joints Water connectors can be optionally placed on the same side or opposite each other CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm 2425461 B14 160 2425403 2425471 B24 250 2425405 2425472 B29 250 2425406 2425482 B29 400 2425506 ETHER Specific usage: Specific features: Operation: For dry ice or solid coolants. Condensing very volatile liquids Inner coolant coil Outer coolant jacket Distillate column Four hose connectors. The main cooling surface area is jacketed by a Liebig type condenser, that is cooled by a separate water supply, preventing vapour from creeping around the outside of the coil. CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C11/23 B24 cone & B19 socket 165 2426354 579

condensers - coil GRAHAM Specific features: Operation: Coolant coil Distillate column Equal size joints The internal coils give an increased cooling surface CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C3/12 B19 165 24257104 C3/13 B24 165 24257105 C3/14 B29 165 24257106 C3/22 B19 320 24257204 C3/23 B24 320 24257205 C3/24 B29 320 24257206 JACKETED COIL Specific features: Coolant coil Distillate column Outer coolant jacket Equal size joints Water inlet and outlet both at the top Water connectors can be optionally placed on the same side or opposite each other CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm CX6/22 B19 160 2425504 CX6/33 B24 160 2425505 CX6/44 B29 160 2425506 MULTI COIL Specific features: Coolant coil Distillate column Equal size joints CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C13/55 B34 230 2426507 C13/55/2 B34 420 2426607 580

condensers - coil REVERSIBLE COIL Specific features: Operation: Coolant coil Distillate column Two cone joints The internal coils give an increased cooling surface CODE CONE JOINTS EFFECTIVE CATALOGUE # LENGTH mm CX3/23 B19 & B24 160 2426245 CX3/35 B24 & B34 160 2426257 THORPE (INLAND REVENUE) Specific usage: Testing and control methods by brewers and distillers and removing condensable vapours from non-condensable gases Specific features: Operation: Distillate coil Coolant jacket Water inlet and outlet both at the top Equal size joints Water connectors can be optionally placed on the same side or opposite each other Vapour and distillate traverse down through the coil Not recommended for fast rates of distillation CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C6/13 B24 205 2425805 TWIN COIL Specific usage: Specific features: When maximum efficiency is required Two coolant coils Separate water inlets and outlets Distillate column Equal size joints CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C4/13 B24 207 2425905 581

condensers - immersion COLD FINGER Specific usage: Specific features: Operation: Immersion into distillation assemblies, etc. Jacketed tube Cone Water inlet and outlet Refluxing can be regulated by adjusting the air or water flow through the condenser CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm FC14/00 B24 100 2426104 condensers - jacketed ALLIHN Specific features: Operation: Bulb distillate chain Outer coolant jacket Equal size joints The internal bulbs give an increased cooling surface CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm CX7/33 B24 400 2425205 DAVIES Specific features: Operation: Distillate column Coolant bulb Outer coolant jacket Equal size joints The outer cooling surface prevents creep and loss of vapour with liquids that have low boiling points CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C5/11 B14 160 24256103 C5/12 B19 160 24256104 C5/13 B24 160 24256105 C5/22 B19 200 24256204 C5/23 B24 200 24256205 C5/24 B29 200 24256206 DEWAR Specific usage: Specific features: For dry ice or solid coolants Coolant chamber Distillate jacket Equal size joints CODE JOINT/S DEPTH mm CATALOGUE # QC-5015 B24 250 2426605 582

condensers - jacketed FRIEDRICH'S Specific features: Operation: Inner coolant chamber Helical indentations Equal size joints The helical indentations inside the cooled surface promote turbulent flow with increased heat transfer and efficiency. Creeping of vapour is avoided because of the minimum annulus between the cooled surface and the outer jacket CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C10/22 B24 100 2426004 LIEBIG (WEST) Specific features: Distillate column Outer coolant jacket Equal size joints CODE JOINT/S EFFECTIVE CATALOGUE # LENGTH mm C1/00 B10 60 24251001 C1/11 B14 155 24251103 C1/12 B19 208 24251204 C1/13 B24 250 24251305 C1/14 B29 250 24251405 condensers - tube Specific features: Specific usage: Distillate column Equal size joints AIR Simple condensation of substances with boiling points above 150ºC AIR REFLUX Reflux work with block heaters CODE JOINT/S EFFECTIVE CATALOGUE # AIR LENGTH mm C2/12 B19 150 24250154 C2/11 B14 200 24250203 FC7/23 B24 250 24250255 C2/22 B19 400 24250404 FC7/43 B24 500 24250505 AIR REFLUX C2/1 B14 150 24267153 C2/3 B24 510 24267515 583

conical measures Wider surface area for easier decanting from a larger vessel Polypropylene and PMP Wide base for stability Graduated POLYPROPYLENE PMP (TPX) CAPACITY ml GRADUATIONS ml CATALOGUE # CATALOGUE # 100 2 1K422 1K1422 250 5 1K423 1K1423 500 10 1K424 1K1424 1000 20 1K425 1K1425 crucibles Melting dry chemicals, metals and minerals Tongs Triangles Gloves Hot grips Alsint 99.7(alumina, aluminium oxide) CAPACITY ml CATALOGUE # 5 0771A 15 0772A 30 0773A 60 0774A 110 0775A Porcelain LOW FORM MEDIUM FORM TALL FORM CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 5 0779000a 0779MF9 10 077900 0779MF8 15 07790 0779MF7 0779C0 20 0779MF7a 25 07791 0779C1 30 07792 40 0779MF6 0779C2 50 07792a 0779MF6a 0779C3 60 0779MF5 75 0779C4 85 07793 90 0779MF4 100 0779MF3 120 0779C5 150 07794 0779MF2 200 0779MF1 250 0779MF1a 584

crucibles Melting dry chemicals, metals and minerals Tongs Triangles Gloves Hot grips Lids *included with 0720897 & 72031 Muffle tray for 0720897 Silica COKING (VOLATILE)* LOW FORM TALL FORM MUFFLE TRAY CAPACITY ml CATALOGUE # CATALOGUE # OPEN END TRAYS 10 0720897 71331 71041 SWELLING 72034 MOISTURE* 72038 15 72101 ROGA 20 72031 25 72061 30 72075 50 72063 72077 80 72065 Zirconium Zirconium Specifications: Melting point 600ºC - 700ºC CAPACITY ml CATALOGUE # 35 08K567 40 08K516 45 08K452 TONGS Stainless steel Bow for easy grip Turned up ends SIZE mm CATALOGUE # 200 08087300 TRIANGLES Ceramic and galvanised wire Tube mounted on twisted wire Tripod (required) SIZE mm CATALOGUE # PIPE CLAY 63 8086250 SILICA 50 08S4530 585

crucibles - lids Finger grip TO FIT CRUCIBLE DIAM. mm CATALOGUE # PORCELAIN 0779MF9 25 0779D9 0779000a, 0779C0, 0779MF8 30 0779D8 077900, 0779C1,07 79MF7 35 0779D7 07790, 0779C2, 0779MF7a 40 0779D7a 07791, 0779C3, 079MF6 45 0779D6 07792, 0779C4, 0779MF5, 0779MF6a 50 0779D5 07792A, 0779C5, 0779MF4 60 0779D4 07793, 0779MF3, 0779MF2 70 0779D2 07794, 0779MF1 80 0779D1 0779MF1a 90 0779D10 SILICA 72075 43 72076 72061 47 72062 72077 51 72078 72063 57 72064 72065 67 72066 crystalising dishes Crystallisation of solids. Receptacle for desiccant in desiccators CAPACITY ml CATALOGUE # 20 0521311240 Beaded rim 40 0521311320 Spout 60 0521311340 100 0521311380 150 0521311410 300 0521311440 500 0521311490 900 0521311540 2000 0521311590 culture bottle - breed-demeter Developing cultures in a growing media and storage Square Flanged lip on neck Rubber bung (21x25x30) Cotton wool plugs can be used for closing CAPACITY ml SIZE mm CATALOGUE # 180 48x148 052148131 586

culture bottles LONG NECK Developing cultures in a growing media and storage Straight flame-polished rim Choice of 16mm or 18mm neck size Kapsenberg cap (as shown) CAPACITY ml SIZE mm CATALOGUE # 50 40x107 214211 100 40x150 214212 200 50x175 214213 MEDIA Straight flame-polished rim Choice of 16mm, 18mm, 31mm or 38mm neck size Kapsenberg cap Blue anodised aluminium cap Glass cap Rubber bung CAPACITY ml SIZE mm CATALOGUE # FOR GLASS CAP 300 70x170 214313 500 80x200 214314 1000 100x235 214315 WITH BEADED RIM 100 50x115 214512 FOR RUBBER BUNG 300 70x165 214513 500 80x200 214514 FOR METAL CAP 100 50x125 217732 300 70x170 217733 500 80x208 217734 587

culture flasks ERLENMEYER-TYPE Culture preparations when a large, flat bottom surface is required for growing cultures to a uniform thickness Straight flame-polished rim 38mm wide neck size for blue anodised aluminium cap Choice of 16mm or18mm narrow neck size for Kapsenberg cap Kapsenberg cap Blue anodised aluminium cap Rubber bung WIDE NECK NARROW NECK CAPACITY ml CATALOGUE # CATALOGUE # 50 217712 214911 100 217712 214912 250 217713 500 217714 1000 217715 2000 217716 FERNBACH Straight flame-polished rim 38mm wide neck size for blue anodised aluminium cap Blue anodised aluminium cap Rubber bung CAPACITY ml SIZE mm CATALOGUE # 1800 200 x 175 052177462 culture tubes Culture preparations and storage Straight rim for Kapsenburg cap crew thread for screwcap Kapsenburg cap Red screwcap Rubber bung SCREW THREAD STRAIGHT RIM CAPACITY ml DIAM. x LENGTH mm CATALOGUE # CATALOGUE # 10 12 x 100 0526135115 12 16 x 100 0523175145 20 16 x 160 0526135215 052613221 25 18 x 180 0526135235 052613223 588

culture tubes - single use Culture preparations and storage Soda-lime glass CAPACITY ml DIAM. x LENGTH mm CATALOGUE # Screw thread 10 12 x 100 0523175115 Black screwcap 12 16 x 100 0523175145 20 16 x 160 0523175215 Pack size: 100 25 18 x 180 0523175235 SINGLE USE Polystyrene Screw thread Screwcap The 15ml has a flat base CAPACITY ml DIAM. x LENGTH mm CATALOGUE # 10 13 x 90 06Z10PSNL Pack size: 100 15 17 x 120 06Z5PSNL cuvettes Holding samples for spectroscopic experiments Polystyrene For single use Pack size: TYPE SIZE mm CATALOGUE # For Olli-C-Analyser 11.85 x 50.8 1K2618 For Fibrintimer 11.9 x 34.5 1K2630 For Amelung 18.65/11.25 x 22.8 1K2631 18.65/11.25 x 22.8 1K82631 589

desiccators - glass Alternate names: Drying chamber Cooling of heated substances and for the storage of dry substances that must not be exposed to the moisture normally present in the atmosphere and soda-lime glass Base with flat flange Lid with matching flat flange Choice of glass or PTFE key or spindle valve stopcock in the lid of the vacuum desiccator Porcelain, plastic or metal perforated desiccator plate Crystalising dish to hold desiccant High vacuum grease for sealing the lid to the base Desiccant Suggested: silica gel orange, calcium chloride anhydrous and phosphorous pentoxide Operation: A desiccator is an airtight container which maintains an atmosphere of low humidity through the use of a suitable drying agent which occupies the bottom part of the desiccator. An ignited crucible or other very hot object should be cooled for about one minute before being placed into the desiccator on a perforated plate. In either case, the lid of the desiccator should be slightly ajar for 30 seconds prior to complete closing. This will prevent a partial vacuum from forming as the heated air cools. If such a vacuum forms it might become very difficult to remove the lid without upsetting the samples within. A dried sample should remain in the desiccator for at least 5 minutes before being weighed. If the sample is to remain in the desiccator for an extended period of time before weighing, the top of the weighing bottle of the lid of the vial should be put in place after 10 minutes of cooling. An airtight seal is maintained by applying a small amount of silicone grease to the flanged surfaces where the lid and body of the desiccator meet. Once the desiccant has been added, the lid to the desiccator should not be removed any more than is necessary Drying agents should not be placed directly in the desiccator but rather in a crystalising dish SODA-LIME GLASS BORO-SILICATE GLASS PLAIN VACUUM PLAIN VACUUM SIZE mm PLATE mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 100 90 05596111 05596311 2478146 2478246 150 140 05596112 05596312 2478157 2478257 200 190 05596113 05596313 2478161 2478261 250 240 05596114 05596314 2478166 2478266 300 280 05596115 05596315 2478169 2478269 SPARE STOPCOCKS Straight shank glass key 24149G Straight shank PTFE key 24149T B24 cone glass key 241495G B24 cone PTFE key 241495T B24 spindle valve 2479904 590

desiccators - plastic Alternate names: Drying chamber Cooling of heated substances and for the storage of dry substances that must not be exposed to the moisture normally present in the atmosphere Polycarbonate and polypropylene Base with flat flange Lid with matching flat flange PTFE stopcock in the lid of the vacuum desiccator Polypropylene perforated desiccator plate Crystalising dish to hold desiccant High vacuum grease for sealing the lid to the base Desiccant Suggested: silica gel orange, anhydrous calcium chloride, phosphorous pentoxide Operation: See previous page LARGE INTERIOR VOLUME -- The space saving design of the desiccator dome provides maximum interior clearances. They provide an average of 13% greater interior volume than standard hemispherical domes. EXTRA HEAVY WALLS -- Clear polycarbonate top and white polypropylene or polycarbonate PLAIN VACUUM VACUUM* SIZE mm CATALOGUE # CATALOGUE # CATALOGUE # 150 1B42030 1B42010 1B42012 200 1B42031 1B42020 1B42022 240 1B42032 1B42025 1B42027 250 1K554 desiccators - plates Supporting samples in desiccators Perforated The porcelain and plastic plates have a centre finger hole for lifting POLYPROPYLENE PORCELAIN METAL DESICCATOR SIZE CATALOGUE # CATALOGUE # CATALOGUE # 100 07119C1 082908046 150 1K551 07119C2 082908057 200 1K231 07119C3 082908061 230 08802-31 250 1K553 07119C4 082908066 300 07119C5 082908069 591

digestion tubes To suit different applications and manual/automatic handling systems The Bruker and Rangmat have flat bottoms and in addition the Rangmat bottom is concave CAPACITY ml DIAM. x LENGTH mm CATALOGUE # PLAIN 15 16 x 145 2416209 75 26 x 255 2416221 100 26 x 300 2416224 250 42 x 300 2416236 350 46 x 296 2416239 KJELDAHL 75 260x 255 2416421 100 26 x 300 2416424 250 42 x 300 2416436 BÜCHI 350 48 x 255 2404739 BRUKER 250 30 x 179 2404836 RANGMAT 50 26 x 143 24095 dissolution vessel Specific usage: Tablet dissolution in a dissolution bath in the pharmaceutical industry 16mm flat flange Amberisation CAPACITY ml DIAMETER mm CATALOGUE # 1000 100 279701 592

distilling flasks Distillation applications Round bottom Long neck Side arm Beaded rim Ground socket on neck Ground cone on side arm CAPACITY ml NECK mm CATALOGUE # 100 22 2124324 250 34 2124336 500 34 2124344 1000 34 2124354 ENGLER - ASTM 125 17 052165328 distilling receivers Specific usage: Distillation apparatus assemblies 24248: Determination of water content in petroleum products with solvent entrainers that are lighter than water 24241: Determination of water content in petroleum products with solvent entrainers that are heavier than water and for estimation of oil content 24247: Vacuum distillation where it is desirable to change flasks without disturbing the vacuum within the system Ground cones and sockets - choice of sizes Glass key stopcocks Standard 9mm tubing olives on 24247 PTFE-key stopcock Spindle valve Screwthread tubing connectors CATALOGUE # Bidwell-Sterling 24239 Dean and Stark, light entrainer with stopcock 24248 Heavy entrainer 24241 Heavy entrainer with stopcock and thermo socket 24244 Modified Bidwell-Sterling with solvent return tube 24240 Dean and Stark with stopcock and return tube 24249 Perkin 24247 593

distribution chamber Alternate names: Vacuum receiver Connection of four flasks to a condenser outlet under vacuum in an assembly B19 and four x B14 joints ground cones and sockets Standard 9mm tubing olive Alternate socket and cones Screwthread tubing connector Delivery adapter as shown CATALOGUE # Flasks 2423643 Operation: Rotate the delivery adapter to empty into different limbs thus filling the receiver flasks without interruption dropping bottles Storage and dispensing of small amounts of liquids Soda-lime glass Ground neck socket Dropping pipette with ground cone Rubber teat Screwthread neck on 05600198 Rubber teat in screwcap on 05600198 CLEAR AMBER AMBER OVAL POLYSTOPPER CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 30 05600198 604003 50 0523270170 0523270176 604006 100 0523270240 0523270246 125 604125 Polyethylene Screw cap with dropper insert Dropping pipette with rubber teat CAPACITY ml CATALOGUE # 50 0694587 100 0694687 RANVIER TYPE 50 1K388 100 1K389 250 1K391 500 1K392 1000 1K393 594

dropping funnels Addition of measured amounts of liquid at a set rate. Solvent reservoir in chromatography. Can also be used as a separating funnel Ground cones and sockets Glass key stopcocks Glass stopper with vent hole Alternate socket and cone sizes Open top Without ground cone Spindle valve Plastic stopper Cleaning brush GLASS KEY PTFE KEY CAPACITY ml SOCKET & CONE CATALOGUE # CATALOGUE # 50 B14 052412417G 052412417T 100 B14 052412424G 052412424T 250 B29 052412436G 052412436T 500 B29 052412444G 052412444T 1000 B29 052412454G 052412454T 2000 B29 052412463G 052412463T drying towers Drying of gasses Column on base Base outlet of choice Standard 9mm tubing olives on Type B Height 250mm Alternate ground socket size B14 bottom socket on Type A Screwthread tubing connectors on Type B Plastic stopper B34 glass stopper with vent hole Cleaning brush CATALOGUE # Type A 24038A Type B 24038B B34 tubing adapter 242127 B34 stopcock adapter 242167 B14 stopcock adapter 242163 595

drying tubes Drying of gasses by passing over a desiccant Ground cones on straight tubes Ground sockets on U tubes Effective length of 100mm Side arms on 24187 Alternate sockets and cones Glass key stopcocks on 24187 Alternate screwthread connectors on 24187 Desiccant, i.e. sodium chloride CATALOGUE # Angled with B14 cone 241603 Angled with B19 cone 241604 Angled with B24 cone 241605 Straight with B14 cone 241613 Straight with B19 cone 241614 Straight with B24 cone 241615 U with B14 sockets 241863 U with B19 sockets 241864 U with B24 sockets 241865 U with sidearms 24187 596

erlenmeyer flasks - glass Alternate names: Operation: Conical flasks Boiling and swirling of liquids. Receiving components in apparatus assemblies. Can also be used as culture flasks White enamel graduations Lipped rim Ground neck on 24193 series Screwthread neck on 24118 series Retaining hooks and springs on 24193 series Magnetic stirrer bar Plastic or glass stopper for ground neck Rubber bung Red screwcap for 24118 series Cleaning brush The conical shape greatly reduces the tendency for precipitates to stick to the inside surface as they slide down the wall NARROW NECK WIDE NECK CAPACITY ml NECK SIZE mm CATALOGUE # NECK SIZE mm CATALOGUE # 25 22 0521216140 31 0521226140 50 22 0521216170 34 0521226170 100 22 0521216240 34 0521226240 250 34 0521216360 50 0521226360 300 34 0521216390 500 34 0521216440 50 0521226440 1000 42 0521216540 50 0521226540 2000 50 0521216630 72 0521226630 5000 51 0521216730 GROUND NECK SCREWTHREAD NECK CAPACITY ml NECK SIZE mm CATALOGUE # NECK SIZE mm CATALOGUE # 25 B14 2419312 50 B14 2419313 GL18 24118172 50 B19 2419314 50 B24 2419315 100 B14 2419323 GL25 24118243 100 B19 2419324 100 B24 2419326 100 B29 2419327 250 B19 2419334 GL32 24118364 250 B24 2419336 250 B29 2419337 500 B24 2419344 GL32 24118444 500 B29 2419346 500 B34 2419347 1000 B24 2419353 GL32 24118544 1000 B29 2419354 1000 B34 2419355 1000 B45 2419357 GL32 24118634 2000 B29 2419363 2000 B34 2419367 2000 B45 2419368 597

erlenmeyer flasks - plastic Alternate names: Conical flasks Boiling and swirling of liquids. Receiving components in apparatus assemblies. Can also be used as culture flasks Polypropylene and PMP(TPX)) Red enamel graduations on polypropylene flasks Blue enamel graduations on PMP(TPX)) flasks Straight neck on 1K146 series Screwcap on 0666 series Plastic stopper as alternate to screwcap Rubber bung for 1K146 series and as alternate to screwcap Cleaning brush POLYPROPYLENE POLYPROPYLENE PMP (TPX) Threaded neck Straight neck CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 50 1K1460 100 06667941 0666795 125 1K1461 250 06668941 1K1462 0666895 500 06669941 1K1463 0666995 1000 1K1464 2000 1K1465 evaporating dishes Evaporating of liquids, polypropylene, porcelain and silica Beaded rim Spout CAPACITY ml RIM DIAM. Mm CATALOGUE # GLASS 15 50 0521301320 45 60 0521301340 60 70 0521301380 90 80 0521301410 170 95 0521301440 PLASTIC 175 100 40925 PORCELAIN SILICA FLAT FORM ROUND BOTTOM FLAT FORM DIAMETER mm CATALOGUE # CATALOGUE # CATALOGUE # 80 1090 2011 90 1091 100 078884 1092 2013 110 1094 130 1065 2014 150 1096 598

extraction flask Alternate names: Mojonnier flask Extraction of fat from milk and milk products Beaded rim Rubber bung SIZE mm CATALOGUE # 160x34 24277 extraction tube In the mining industry. Capillary extrusion at top Round bottom CATALOGUE # 24159 extractors - liquid/liquid BAFFLE DISC TYPE Specific usage: Operation: Solvent extraction in liquid/liquid separation processes Ground cone and socket Distributor that fits inside the extractor body Alternate size cone and socket Retaining hooks and springs Keck retaining clips Continuous operation for volumes of 10ml to 500ml. Condensed solvent falls onto the baffles and is broken into small droplets which are distributed through the liquid sample and extract the desired components and/or contamination. The solvent then returns to the boiling flask by way of the tube on the side of the extractor CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX10/23 60 B45 & B24 2414023 EX10/20 Distributor - 24143 599

extractors - liquid/liquid LIGHT PHASE Specific usage: Solvent extraction in liquid/liquid separation processes Ground cone and socket Distributor that fits inside the extractor body Alternate size cone and socket Retaining hooks and springs Keck retaining clips Continuous operation light phase extraction for volumes of 10ml to 500ml CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX8/25 100 B34 2414125 EX8/20S Distributor 24136 EX9/33 200 B34 & B24 2414133 EX9/30S Distributor 24137 HEAVY PHASE Specific usage: Continuous operation heavy phase extraction for volumes of 500ml to 2500ml CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX10/53 400 B34 24142415 EX12/33S Distributor B24 & B34 24138 extractors - liquid/solid Solvent extraction in liquid/solid separation processes Ground cone and socket Separate distributor support inside the extractor body Alternate size cone and socket Retaining hooks and springs Keck retaining clips Thimbles CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX7/13 60 B34 & B24 2413013 FC8/23 200 B34 & B24 2413023 EX13 Distributor support 24146 600

extractors - liquid/solid Solvent extraction in liquid/solid separation processes Ground socket and cone with drip tip Inner liner with integral siphon tube Alternate size cone Retaining hooks and springs Keck retaining clips CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX7/13 20 B34 & B24 2412913 EX7/10 Liner 241321 EX7/23 50 B45 & B24 2412923 EX7/20 Liner 241322 EX7/33 100 B55 & B24 24129245 EX7/30 Liner 2413230 extractors - soxhlet, liquid/solid Soxhlet solvent extraction in liquid/solid separation processes Ground cone and socket Siphoning tubes Flat flange body and lid with retaining clip allows insertion of large thimbles Alternate size cone and socket Retaining hooks and springs Keck retaining clips Thimbles CODE CAPACITY ml SOCKET & CONE CATALOGUE # EX5/21 5 B19 & B14 2413121 EX5/32 20 B24 & B19 2413132 EX5/43 40 B29 & B24 2413143 EX5/53 60 B34 & B24 2413153 EX5/55/100 100 B34 & B34 2413155 EX5/63 100 B34 & B34 2413156 EX5/83 200 B50 & B24 2413163 FLAT FLANGE TYPE CODE CAPACITY ml FLANGE & JOINTS CATALOGUE # EX5/75 600 60 & B34 2413375 DA5/75 Lid 60 2413575 EX5/105 2000 100 & B34 24133105 DA5/100 Lid 100 24135100 601

extractors - thimbles In soxhlet extractors in liquid/solid extraction processes Cellulose fibre Pack size: 25 CAPACITY ml THIMBLE SIZE mm CATALOGUE # 6 10 x 50 20 18 x 65 40 22 x 80 02-3000-025 60 28 x 80 100 28 x 120 200 41 x 123 600 60 X 160 2000 90 X 290 eye-wash station Emergency first aid Backboard - green polystyrene Bottle - polyethylene Backboard: Wall mountable with recess to hold an eyewash bottle. Directions are clearly printed on the backboard Bottle: Eye cup with snap on cap. Head with an air vent valve. Perforated spray plate. Drain tube Operation: The bottle is ergonomically designed to allow quick and immediate flushing to remove foreign matter and prevent serious eye damage. It can be filled with distilled water or any certified eyewash solution. The air vent in the head assures air refill of free space in the bottle thus preventing draw back of contaminated wash into the bottle. The perforated spray plate in the cup centre breaks up the stream to give the eye a gentle wash. A drain tube releases waste ITEM CATALOGUE # Station 1K2386 Bottle 1K383 fermentation tubes Fermentation processes CATALOGUE # 2 bulbs 24275 3 bulbs 24276 602

filter crucibles - glass Alternate names: Operation: Gooch crucible Applications in quantitative analysis. Precipitates that have to be dried to the constant weight Flame polished rim Sintered disc with porosity of choice After cleaning, the filter crucible quickly reaches constant weight at 110ºC, as the remaining water evaporates. After the filtration it is placed with the moist precipitate in the hot drying cabinet at up to 150ºC where it is dried to the constant weight. Depending on the method of determination, it can be cooled by exposure to air or in a desiccator. To calcine a precipitate the crucible is placed in a cold oven and heated up to a maximum of 500ºC. After heating has been switched off it is allowed to cool down to about 200ºC in the oven Adapter Gloves Tongs Rubber sealing sleeve Hot grips CAPACITY ml POROSITY DIAMETER mm DISC DIAMETER mm CATALOGUE # 10 P0 24 20 2406008 10 P1 24 20 2406108 10 P2 24 20 2406208 10 P3 24 20 2406308 10 P4 24 20 2406408 15 P0 26 20 2406009 15 P1 26 20 2406109 15 P2 26 20 2406209 15 P3 26 20 2406309 15 P4 26 20 2406409 30 P0 36 30 2406012 30 P1 36 30 2406112 30 P2 36 30 2406212 30 P3 36 30 2406312 30 P4 36 30 2406412 50 P0 56 40 2406017 50 P1 56 40 2406117 50 P2 56 40 2406217 50 P3 56 40 2406317 50 P4 56 40 2406417 60 P0 56 40 2406019 60 P1 56 40 2406119 60 P2 56 40 2406219 60 P3 56 40 2406319 60 P4 56 40 2406419 ADAPTERS FOR CRUCIBLE ml CATALOGUE # 10 2431608 15 2431609 30 2431615 50 2431617 60 2431619 603

filter crucibles - ceramic Alternate names: Gooch crucible Applications in quantitative analysis. Precipitates that have to be dried to the constant weight Porcelain Perforated base Tongs Lid with finger grip Gloves Hot grips CAPACITY ml DIAM. x HEIGHT mm CATALOGUE # 20 37 X 35 0782A1 25 38 X 40 0782A2 35 41 X 43 0782A3 10 27 X 30 0782R2 17 17 X 30 0782R2a 25 25 X 35 0782R3 LIDS FOR CRUCIBLE DIAM. mm CATALOGUE # 82R3, 841 35 0779D7 82A1, 82A2 40 0779D7a 82A3 45 0779D6 SLEEVES SIZE mm TO FIT CRUCIBLE ml CATALOGUE # 26 8 082920114 33 15 082920121 41 30 082920126 49 50 082920131 filter apparatus Alternate names: Filter head. Screw filter Filtration through sintered media or filter paper Reservoir head with screwthread and white enamel graduations Screw-on funnel Two ring seals Slit sieve CAPACITY ml CATALOGUE # Filter disc with fused rim 250 052472050 FILTECH filter paper 1000 2472090 Operation: To use filter paper circles insert the slit sieve into the screw-thread and place the filter paper circle on top of it, between the two ring seals ACCESSORIES POROSITY CATALOGUE # Filter disc P1 052520501 P2 052520502 P3 052520503 P4 052520504 Slit sieve 082134131 604

filter funnels - conical Quantative analysis, preparative chemistry and sterile filtration Conical funnel Flame polished rim Sintered disc Drip tip stem Length of stem Ground cone on the stem Guko DIAM. & STEM mm POROSITY DISC DIAMETER mm CATALOGUE # 55 P0 25 24051055 55 P1 26 24051155 55 P2 27 24051255 55 P3 28 24051355 55 P4 29 24051455 70 P0 30 24051070 70 P1 30 24051170 70 P2 30 24051270 70 P3 30 24051370 70 P4 30 24051470 80 P0 30 24051080 80 P1 30 24051180 80 P2 30 24051280 80 P3 30 24051380 80 P4 30 24051480 100 P0 40 240510100 100 P1 40 240511100 100 P2 40 240512100 100 P3 40 240513100 100 P4 40 240514100 150 P0 60 240510150 150 P1 60 240511150 150 P2 60 240512150 150 P3 60 240513150 150 P4 60 240514150 605

filter funnels - cylindrical JACKETED Specific usage: Quantative analysis, preparative chemistry and sterile filtration Guko Cylindrical reservoir Flame polished rim Sintered disc Drip tip stem Integral water jacket on the jacketed funnel Standard 9mm tubing olives on the jacketed funnel Length of stem Ground cone on the stem Screwthread tubing olives Guko Screwthread tubing connectors Filtration of liquids where a constant temperature needs to be maintained Operation: A temperature controlling medium is circulated through the integral jacket JACKETED CAPACITY ml DIAMETER mm POROSITY CATALOGUE # CATALOGUE # 50 50 P0 24050217 24040917 50 50 P1 24051217 24041917 50 50 P2 24052217 24042917 50 50 P3 24053217 24043917 50 50 P4 24054217 24044917 100 100 P0 24050224 24040924 100 100 P1 24051224 24041924 100 100 P2 24052224 24042924 100 100 P3 24053224 24043924 100 100 P4 24054224 24044924 150 150 P0 24050229 24040929 150 150 P1 24051229 24041929 150 150 P2 24052229 24042929 500 150 P3 24053229 24043929 500 150 P4 24054229 24044929 200 200 P0 24050232 24040932 200 200 P1 24051232 24041932 200 200 P2 24052232 24042932 200 200 P3 24053232 24043932 200 200 P4 24054232 24044932 250 250 P0 24050036 24040936 250 250 P1 24051036 24041936 250 250 P2 24052036 24042936 250 250 P3 24053036 24043936 250 250 P4 24054036 24044936 606

filter tubes Filtration apparatus assemblies for specialised filtration techniques Sintered disc or candle Flame polished rim Drip tip stem Standard 9mm tubing olives Screwthread tubing olives ALLIHN CAPACITY ml POROSITY CATALOGUE # 30 P0 24059013 30 P1 24059113 30 P2 24059213 30 P3 24059313 30 P4 24059413 100 P0 24059024 100 P1 24059124 100 P2 24059224 100 P3 24059324 100 P4 24059424 MICRO FILTER TUBE Specific usage: Reactions between gasses and liquids DIAM. x LENGTH mm POROSITY CATALOGUE # 8 x 200 P0 24056200 8 x 200 P1 24056201 8 x 200 P2 24056202 8 x 200 P3 24056203 8 x 200 P4 24056204 IMMERSION FILTER STICK Specific usage: Operation: Reverse filtration by connection to a vacuum supply to draw off supernatant liquid from a precipitate When the purpose of suction filtration is to recover large quantities of clear filtrate and not the solids content, reverse filtration is used. The precipitate is allowed to settle and the above it is drawn off through an immersion filter. As there is little tendency for filter cakes to form on the filter disc, high filtration speeds can be achieved DIAM. x LENGTH mm POROSITY CATALOGUE # 8 x 210 P0 24054100 8 x 210 P1 24054101 8 x 210 P2 24054102 8 x 210 P3 24054103 8 x 210 P4 24054104 6 x 100 P0 24054210 6 x 100 P1 24054211 6 x 100 P2 24054212 6 x 100 P3 24054213 6 x 100 P4 24054214 607

filter tubes - pipe-line Specific usage: Connection to flexible pipe-lines for liquid and gas filtration. Pressure or suction filtration of pharmaceutical solutions Sintered disc Standard 9mm tubing olives Screwthread tubing olives FILTER DIAM. mm POROSITY CATALOGUE # 30 P0 24055300 30 P1 24055031 30 P2 24055032 30 P3 24055033 30 P4 24055034 40 P0 24055060 40 P1 24055061 40 P2 24055062 40 P3 24055063 40 P4 24055064 flat flange flasks When extra wide necks are required in apparatus assemblies Round bottom Wide neck Flat ground flange Alternate flange size Amberise Lid See REACTION VESSELS CAPACITY ml FLANGE BORE mm CATALOGUE # 250 75 2411536 500 75 2411544 1000 100 2411554 2000 100 2411563 florentine flasks Alternate names: Evaporating flask. Rotary flask Rotary evaporators Ground neck socket Alternate ground neck socket size Amberise Retaining hooks and springs CAPACITY ml SOCKET mm CATALOGUE # 100 B24 24120245 250 B24 24120365 500 B24 24120445 1000 B29 24120546 2000 B29 24120636 608

forceps Alternate names: Tweezers Holding small, delicate or sterile articles White PMP (sharp end) Yellow POM (blunt end) Length 115mm SHARP END BLUNT END CATALOGUE # CATALOGUE # 067895 1K500 Stainless steel SHARP END BLUNT END Length 125mm CATALOGUE # CATALOGUE # 08094010 08094011 fractionating columns DUFTON Specific usage: Operation: Fractionating assemblies Alternate ground cone and socket sizes Coolant jacket Retaining hooks and springs Keck retaining clips Gas analysis Ground cone and socket Inner rod Fitted glass spiral that can be removed for cleaning. Drip tip Liquid spirals down the column and meets the ascending vapour CODE SOCKET & CONE mm JACKET LENGTH mm CATALOGUE # FC1/12 B19 150 24042204 FC1/22 B19 300 24042404 FC2/13 B24 150 24042205 FC2/23 B24 300 24042405 609

fractionating columns HEMPEL Operation: Ground cone and socket Packing support Raschig rings, Fenske helices or glass beads Liquid cascades down the packing and meets the ascending vapour CODE SOCKET & CONE mm JACKET LENGTH mm CATALOGUE # FC7/23 B24 250 24040305 FC7/43 B24 500 24040605 FC7/44 B29 500 24040606 FC7/53 B24 750 24040805 FC8/23 B34 & B24 272 24040375 FC8/43 B34 & B24 522 24040675 PACKING CODE SIZE mm CATALOGUE # Raschig rings FC8/06 6 2403906 Raschig rings FC8/09 9 2403909 Fenske helices FC8/4S 4 2403904 Spiral support EX13 2403905 PEAR/BULB Operation: Ground cone and socket Set of bulbs and pears which can be removed for cleaning Drip tip The bulbs are inserted into the column with the narrower diameter downwards. They are each separated by a glass pear (bubble). A liquid seal is formed between them and the column wall. Ascending vapour causes oscillation of the pears and resultant efficient mixing of liquid and vapour. The castellations allow excess liquid to flow down from bulb to bulb thereby reducing back-pressure and hold-ups CODE SOCKET & CONE mm JACKET LENGTH mm CATALOGUE # FC6/23A B34 & B24 225 2404375 PACKING SNYDER Operation: Ground cone and socket Fitted glass spikes and plugs CODE CATALOGUE # Bulb FC6/00 2404500 Pear FC6/10 2404510 Liquid cascades down the column and meets the ascending vapour which pushes the plugs upwards out of their sockets thus increasing the vapour-liquid contact and preventing flooding CODE SOCKET & CONE mm JACKET LENGTH mm CATALOGUE # QD-3112 24/29 350 2404405 VIGREUX Operation: Ground cone and socket Combination of horizontal and angled spikes Drip tip The horizontal spikes cause good vapour-liquid contact and the angled spikes redistribute liquid from the column walls to the centre of the column CODE SOCKET & CONE mm JACKET LENGTH mm CATALOGUE # FC3/13 B24 360 24041605 FC3/23 B24 600 24041705 FC3/14 B29 360 24041606 610

fractionating head Operation: Division of liquid in a fractional distillation process Integral jacketed spiral condenser Ground cones Standard 9mm tubing olives Screwcap for thermometer Spindle valve Side arm for venting or connection to a vacuum supply Alternate ground cone sizes Screwthread tubing connections Retaining hooks and springs Thermometer Keck retaining clips Fits on top of a fractionating column. Liquid leaving the integral condenser is directed towards the spindle valve, adjustment of which controls the proportion of liquid returned to the column or that is collected CODE CATALOGUE # SH30/42 0524080 fractionating reflux divider To control the proportion of collected or returned liquid in a fractionating distillation assembly Sluice head Spindle valve Ball and cup joint Distillate head adapter Sockets and drip tip cones Retaining spring clip Retaining hooks and springs Condenser CATALOGUE # Keck retaining clips 24170 Operation: Insert the sluice head into the fractionating column and the distillate adapter into the socket of a condenser. Close the spindle valve to allow all liquid to return into the column. Open the spindle valve progressively to allow a greater proportion of liquid to be directed to a receiver It is recommended that a condenser be fitted to the outlet cone of the sluice head as the liquid leaving the distillate head could be close to boiling point freezing point determination set Components: Determination of freezing point of a liquid 800ml beaker Two test tubes one of which fits into the other Lid with thermometer hole and centre hole Two rubber stoppers Agitator Two thermometers CATALOGUE # ZGA010004 611

funnels - glass Facilitatory filling of vessels and qualitative and quantitative filtration Conical - 58-60 º All, except short stem and powder, are ribbed for rapid filtration and prevention of sealing FILTECH filter paper circles Stand Addition of a ground cone to the stem ANALYTICAL LONG STEM POWDER RIBBED, FLUTED SHORT STEM RIM DIAM. mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 35 052135123 45 052135128 50 052135432 55 052135133 65 052133137 70 052135338 052135438 052135238 052135138 80 052133141 052135341 052135241 052135141 100 052135446 052135246 052135146 110 052133148 150 052135157 Soda-lime glass Not recommended for hot liquids LONG STEM SHORT STEM RIM DIAM. mm CATALOGUE # CATALOGUE # 50 0511241060 60 0511241080 70 0511241110 75 05793208 100 05793210 0511241190 120 0511241230 150 0511241310 THISTLE Specific usage: Containment of splashing Soda-lime glass RIM DIAM. mm CATALOGUE # 40 600399 612

funnels - plastic Facilitatory filling of vessels and qualitative and quantitative filtration Polypropylene and HDPE. The Urbanti funnel is PMP (TPX) Conical - 58-60 º All, except powder, are ribbed for rapid filtration and prevention of sealing The Urbanti has internal spiral ribs for rapid filtration FILTER PAPER CHART Funnel diameter Filter paper to use Funnel diameter Filter paper to use 50mm 5.5 & 7cm 100 & 110mm 15 & 12.5cm 55-65mm 7 & 9cm 120mm 18.5 & 24cm 70 & 80mm 11 & 12.5cm 150mm 24 & 27cm POLYPROPYLENE PMP (TPX) HDPE LONG STEM SHORT STEM POWDER URBANTI GENERAL PURPOSE RIM DIAM. mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 60 1K162 1K171 75 06413-94 80 1K164 1K150 1K167 1K4171 100 1K152 06709-94 063252-95 1K172 120 1K165 1K153 1K169 1K173 140 1K174 150 1K155 1K170 180 1K156 1K166 1K175 200 06417-94 220 1K176 250 1K177 300 1K178 FUNNEL HOLDER Polypropylene Supports two funnels Rod screw lock Retort stand CATALOGUE # 18242 gas collection tube Collecting and weighing generated gasses Stopcocks with glass keys each end Standard 9mm tubing olive Alternate screwthread tubing connectors Alternate double oblique bore stopcocks PTFE stopcock keys Screwthread tube for septum CODE CAPACITY ml CATALOGUE # GRF246 250ml 2415836 613

gas jars Collecting generated gasses Soda-lime glass Cylinder with lipped rim Flat ground flange Cover SIZE mm CATALOGUE # 150 x 50 05600405 Beehive shelf 200 x 50 05600410 Operation: The bee hive shelf is usually placed in a trough of water. A bent glass tube from the gas generating apparatus is led under the shelf through the arch. A gas jar is filled with water and placed upside down over the hole in the bee hive shelf. The gas bubbles upwards from the tube, displacing water which is forced down through the hole. When the cylinder is full the cover is slid between the jar and the shelf thus sealing in the gas. gas washing bottles Wash or dry gases of unwanted constituents ARNOLD ABSORPTION BULB Inner bulbs Straight tubing connectors CODE CAPACITY ml CATALOGUE # ARF008 125 24018 DRECHSEL Ground neck socket Solid base CODE CAPACITY ml CATALOGUE # MF29/3/125 125 0524018-150 2402065 MF29/3/250 250 2402085 MF29/3/500 500 2402095 WASHING HEADS Ground cone Sintered candle distributor Straight tubing connection pipe Dip tube - fixed or adjustable CODE CATALOGUE # Dreschel, plain dip tube MF28 240215 Dreschel, sintered candle distributor MF48 240225 Dreschel, adjustable dip tube MF27 240235 Dreschel, adjsable dip tube and distributor - 240245 614

gas washing bottles Wash or dry gases of unwanted constituents MIDVALE ABSORPTION BOTTLE (BULB) Bulbous base Outlet tube in ground neck socket Hollow glass stopper with hole to match outlet tube Operation: Outlet tube is in the socket allowing flow-closure by a turn of the stopper CODE CATALOGUE # ARF010 24017 SCHOTT Wash head Distribution tube GL45 screwcap Screwthread tubing connectors White enamel graduations Sintered candle of choice on distribution tube CAPACITY ml CATALOGUE # 250 2401936 500 2401944 1000 2401954 2000 2401963 WASH HEAD 24065 gloves - disposable Latex and nitrile rubber Available in small, medium and large. Latex available in powdered and powder-free Pack size: 100 LATEX NITRILE POWDERED POWDER-FREE SIZE CATALOGUE # CATALOGUE # CATALOGUE # Small 08093717 08093718 08093719 Medium 08093727 08093728 08093729 Large 08093737 08093738 08093739 615

gloves & hand protectors "CLAVIES" Handling hot and biohazard items, hot objects out of the autoclave or oven and where other heat protection is needed Replace hazardous asbestos gloves Soft, pliant, all-cotton terry cloth Heat resistant up to 232ºC Machine wash, tumble dry Gauntlets in two lengths provide wrist and forearm protection The bright orange colour gives high visibility GAUNTLET LENGTH mm CATALOGUE # 130 08132010 280 08132011 HOT GRIPS Silicone rubber. Application range from -57 º C to +250 º C Multi-studded surfaces CATALOGUE # 1K3915 hirschson flasks Alternate names: Phenol flask Determination of phenols in oils White enamel graduations Beaded rim Long neck Addition of ground socket Rubber bung CAPACITY ml CATALOGUE # 150 2411329 200 2411332 616

hydrometers Alternate names: Operation: Density meter. Aerometer Establishing the density of a liquid or preparation of an identified liquid based on Archimedes's Principle Allow the hydrometer to float freely and determine the reading at the surface level of the liquid RANGE CATALOGUE # 0.8 to 0.9 H0809 0.9 to 1.0 H0910 1.0 to 1.1 H1011 1.1 to 1.2 H1112 1.2 to 1.3 H1213 1.3 to 1.4 H1314 1.4 to 1.5 H1415 1.5 to 1.6 H1516 1.6 to 1.7 H1617 1.7 to 1.8 H1718 1.8 to 1.9 H1819 1.9 to 2.0 H1920 incinerating dishes Incineration of samples for analysis. The deep form is primarily used for incinerating flour Porcelain Glazed inside and outside Spout on the deep form CAPACITY ml SIZE mm CATALOGUE # CYLINDRICAL 20 40 x 20 331 30 50 x 25 332 45 60 x 30 334 DEEP 35 57 5032 FLAT 5 37 x 10 33D2 8 42 x 11 33D3 10 47 x 12 33D4 RECTANGULAR 10 48 x 25 33C00 15 55 x 40 33C00b 12 70 x 45 33C4b. 15 57 x 23 33C7 617

inlet tubes Introduction of air, steam or gas into reactions. Ground cone CODE TYPE CONE mm CATALOGUE # MF15/0 Straight - 100mm B10 24190150 MF15/1 Straight - 100mm B14 24190151 MF15/2 Straight - 150mm B19 24190152 MF15/3 Straight - 150mm B24 24190153 MF15/4 Straight - 150mm B29 24190154 iodine flasks Storage of iodine and other halogenous substances Ground neck socket White enamel graduations Neck collar Amberise CAPACITY ml NECK mm CATALOGUE # 100 B24 0524192270 250 B24 0524192370 500 B29 0524192460 1000 B29 0524192560 STOPPER Ground cone SIZE mm CATALOGUE # Hollow pointed B24 05243055 Long shank B29 05243056 jack Supporting and elevating laboratory bench equipment Polycarbonate Steam autoclavable at 121 C Large height adjusting knob to set heights from 76mm to 30cm Supports lab items up to 6.8 Kg. Electrically non-conductive Top plate diameter of 21cm Can be permanently mounted to the laboratory bench Do not lift weight from the bottom position. Place weight after raising to the desired position CATALOGUE # Jack 183911 Support rod 183912 618

jars Specimen storage HDPE Screwcap CAPACITY ml PACK SIZE CATALOGUE # 100 100 2010032 250 150 2025032 500 100 2050032 1000 99 2100032 Polypropylene Screwcap Write-on section CAPACITY ml CATALOGUE # 150 1K5640 kipp's apparatus Gas generation Soda-lime glass Reaction chamber Reservoir CAPACITY ml CATALOGUE # Glass key stopcock 500 600470 Three-bulb fermentation tube 1000 600471 619

kjeldahl distillation unit Components: Kjeldahl distillations Kjeldahl flask Delivery adapter Liebig condenser Dropping funnel Splash head Two-neck multiple adapter CATALOGUE # ZGA020006 Regulate the heating source carefully Use the least necessary concentration of potassium sulphate Avoid excess of sodium hydroxide (caustic soda) Avoid distilling to a low liquid level kjeldahl flasks Kjeldahl distillations Long neck Beaded rim Round bottom Addition of ground socket Amberise CAPACITY ml NECK DIAMETER mm CATALOGUE # 50 22 0521231170 100 22 0521231240 250 34 0521231360 500 34 0521231440 1000 34 0521231540 kohlrausch flasks Determination of viscosity of liquids Widened neck above the volume level Mark at volume level Beaded rim Flat bottom CAPACITY ml CATALOGUE # 50 2411217 100 2411224 200 2411232 620

labeling systems Laboratory labeling and marking LABEL TAPES Write-On TM Label Tape colours match the Chemical Industry's color-coding system, making chemical labeling immediately identifiable. Six tape colours correspond with recognized hazard colour codes to emphasize safety information written on the labels; use green for safety labels, blue for labels that indicate health hazards, red for alerts about flammability, yellow for warnings about chemical reactivity, orange to note biohazard issues and white to highlight specific hazards. Write-On TM Label tape adheres to any clean surface, including PTFE fluoropolymer resin coated materials, and peels off without leaving a sticky residue that could bond to the surface during autoclaving. The tape is custom manufactured from proprietary materials that resist moisture and most solvents. The tape remains in place and withstands broad temperature and environmental extremes; from steam autoclaving at 121ºC down to 73ºC, ensuring samples are always "labeled". Pencil, ballpoint pen or solvent ink marker remains legible under the most demanding laboratory conditions. CATALOGUE # 34610 Holds and releases tape cut to required length. Accommodates tape rolls up to 133mm wide and the 7.0cm core fits standard tape rolls up to 25mm wide. A writing platform accommodates both left and right handed users for labeling tape prior to dispensing. The epoxy coated steel platform has finger holes for releasing the tape with a cut off edge for one hand use. A weighted base with non skid pads prevent sliding or lifting. The base is 213mm long x 87mm wide x 95mm high with a 102 x 152mm platform DISPENSERS: SINGLE ROLL 30meter x WIDTH CATALOGUE # WHITE 13mm 3463005 WHITE 19mm 3463075 WHITE 25mm 3463010 RED 13mm 3463105 RED 19mm 3463110 RED 25mm 3463105 YELLOW 13mm 3463175 YELLOW 19mm 3463210 YELLOW 25mm 3463205 GREEN 13mm 3463275 GREEN 19mm 3463310 GREEN 25mm 3463305 BLUE 13mm 3463375 BLUE 19mm 3463410 BLUE 25mm 3463405 ORANGE 13mm 3463475 ORANGE 19mm 3463510 ORANGE 25mm 3463505 621

labeling systems MULTI-ROLL The Write-On TM multi-roll tape dispenser makes labeling easy and fast. Multiple colours and widths of labeling tape are readily positioned on a platform tha provides a smooth surface for writing on each tape. When a tape is advanced and cut off on the serrated edge, a fresh length of label tape is positioned on the writing platform. A variety of labeling tape widths from 12-25mm can be mixed together on the spindle which can easily accommodate 5 or more narrow rolls 12-19mm or four wider rolls 25mm. The spindle can be removed from the unit for loading and unloading tape and can be adjusted to hold either 25 or 75mm core diameter rolls. Included with each dispenser are three plastic separating discs, which when placed between the rolls assure smooth, snag free dispensing for up to four rolls of tape. Moulded -in pen holder wells on the dispenser help to keep writing instrument handy. The dispenser can also be wall mounted vertically o horizontally with the platform, the mounted dispenser can be equipped with an optional U-shaped stainless steel foot accessory that presents the dispenser at a 45º angle off of the wall. CATALOGUE # Multi-roll dispenser 34730 Additional separator discs 34693 Wall mount bracket 34731 A highly popular, permanent labeling system that offers great flexibility and convenience for identifying containers, cabinets, drawers, books and lab equipment. This unique system incorporates a tape dispenser, color-coded labels and clear, waterproof, wear-resistant plastic tape which fully covers and protect the label. The durable tape dispenser (A) is molded of strong ABS plastic with a steel serrated cutting blade. The roll is held in place by a spring-loaded cover and features an aluminium roller. 206 x 117 x 60mm. An optional weighted base (B) prevents surface spillage. CATALOGUE # Dispenser 34500 Weighted base 34501 White labels: 12.5 x 38mm x 1000 34505 25 x 76mm x 1000 34510 38 x 76mm x 1000 34515 Protective tape: 25mm x 30m 34310 38mm x 30m 34315 50mm x 30m 34320 INK COLOUR CATALOGUE # Belpen markers: pack of 3 Black 33740 Blue 33742 Manomark pens: Box of 12 Assorted* 33770 Box of 12 Black 33771 Tech pens: Black 33820 Black 33841 Waterproof ink that withstands autoclaving Red 33842 White 33843 Yellow 33844 Blue 33845 Green 33846 Orange 33847 622

laboratory bottles Alternate names: Sample bottles. Schott bottles. Specimen bottles Storage of reagents Retrace code for batch traceability via the internet at www.duran-group.com/english/products/duran/certification/retrace.html Pouring ring White enamel graduations Blue GL45 screwcap except 50ml which has GL32 Addition of side arm Addition of stopcock Different colour pouring rings Different colour screwcaps Loosen caps before autoclaving CLEAR AMBER SQUARE CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 50 0521801175 0521806175 100 0521801245 0521806245 250 0521801365 0521806365 0521820365 500 0521801445 0521806445 0521820445 1000 0521801545 0521806545 0521820545 2000 0521801635 0521806635 5000 0521801735 0521806735 10000 0521801865 0521806865 15000 0521801885 0521806885 20000 0521801915 0521806915 POURING RINGS & SCREWCAPS Polypropylene except red which are ETFE POURING RINGS SCREWCAPS SIZE CATALOGUE # Blue GL32 082924219 082923919 Red GL32 082924419 082924019 White GL32 082924220 082933919 Blue GL45 082924228 082923928 Red GL45 082924428 082924028 White GL45 082924221 082933920 Green GL45 081089914 0829338286 Yellow GL45 081089911 0829338280 Grey GL45 081089917 0829338288 623

laboratory bottles - hplc Conformity: Operation: Feeding solvents (eluents) to HPLC machines and collection of waste from HPLC processes of culture media under pressure (e.g. fermenter). Can also be used in all self-contained systems entailing sterile transfer Bottle:. Cap: PTFE and polypropylene The bottle has a special geometry according to ISO 4796, and is pressure/vacuum resistant in a range from 1 to +1.5 bar. The pressure resistance has been safety tested as per EN 1596 and is TÜV-GS certified Retrace code for batch traceability via the internet at www.duran-group.com/english/products/duran/certification/retrace.html Blue GL45 screwcap with 4 ports for tubing 1.6mm or 3.2mm Pressure resistant bottle 4 seals for ports 4 seals for 1.6mm tubing 4 seals for 3.2mm tubing Blue enamel graduations Ready for immediate use The four ports make it possible to serve three stations at the same time from one container. At the same time, the fourth port can be used for sterile pressure equalization. Unused ports can be closed with the special seals Pressure equalisation set with 0.2µm membrane filter Tubing Cleaning brush CAPACITY ml CATALOGUE # 500 0521129821 1000 0521129820 laboratory bottles - wide neck Alternate names: Sample bottles. Schott bottles. Specimen bottles Storage of reagents Blue GL45 screwcap White enamel graduations Retrace code for batch traceability via the internet at www.duran-group.com/english/products/duran/certification/ retrace.html Loosen caps before WIDE NECK autoclaving CAPACITY ml CATALOGUE # 500 051112627 1000 051112713 2000 051112715 5000 051113949 CAP 081112716 624

magnetic stirrers Alternate names: ELECTRIC Magnetic mixer Variable speed - 100 to 1000 rpm 240 volts Maximum stirring capacity 1000ml ELECTRIC WITH HOT PLATE Variable speed - 0 to 1250 rpm 220 volts Heating temperature up to 500 º C WATER/AIR TURBINE STIRRER Polypropylene/ABS CATALOGUE # 600471 CATALOGUE # 73645 Operated by water or air pressure Can be used flat on the bench or clamped onto a retort stand Water pump Magnetic stirrer bars CATALOGUE # Tubing 1K203 625

magnetic stirring bars Facilitates agitation of liquids in beakers, bottles or flasks MAGNETIC STIRRING BAR SELECTION & USE Matching the drive and stirring bar can dramatically improve results! Magnetic stirring and mixing is used in a number of common laboratory procedures. The importance of selecting the best stirring bar for each particular application is often overlooked. Varying the size, shape or length of the magnetic stirring bar will after the motion imparted to the solution. Thus, selection of the appropriate stirring bar for given application should be done with great care. Understanding the principles of magnetism is important. On the most basic level, we are aware that opposite poles attract. However, we must also understand the significance of the drive element, magnetic coupling, spin-out, vessel shape, viscosity and turbulence. The drive motor of a magnetic stirrer provides the rotation necessary to spin the drive magnet. The drive magnet is generally a bar or U-shaped alloy or a ceramic disk. The magnetic poles are typically about 50mm apart in bench top models. The poles can be up to 140mm apart in units large enough to mix 190litres of liquid solution. For optimum efficiency and magnetic coupling, the distance between the magnetic poles of the drive magnetic poles of the drive magnet and the length of the stirring bar should be equal. Therefore, the drive magnet dictates the longest possible stirring bar that can be used effectively. A small metal washer moved around the surface plate of the stirrer will naturally gravitate towards one of the poles of the drive magnet. A small magnetic stirring bar will provide similar results. Another important parameter in choosing a magnetic stirring bar is the vertical distance between the drive magnet and stirring bar. The material and thickness of the cover plate as well as that of the containing vessel can also influence stirring efficiency. Cover plates are made of paramagnetic materials such as ceramic or aluminum, which offer better coupling of the drive magnet and stirring bar. The magnetic energy is not impeded as it might be if the top were made of magnetic materials. The amount of magnetic energy that joins the two magnets (coupling) falls off as the distance between them increase. Stated mathematically, the coupling energy of force is inversely proportional to the square of the distance between them. It stands to reason that for the best magnetic coupling, the distance between the magnets should be minimized. Magnetic stirring bars are generally made of ALNICO (an alloy of aluminum, nickel, iron and cobalt) encapsulated in an FDA approved PTFE coating. This combination offers the best compromise of magnetic strength, usefulness and cost. The PTFE coating is only useful at temperatures up to 225 C. Other coatings or coverings such as glass tubing, polypropylene and polyethylene are also used. More exotic materials have not been found to be commercially viable. High energy materials, such as Samarium Cobalt and Neodymium Iron Boron, though having a much higher energy product (Bd x Hd) than ALNICO V, do not always work better as drive magnets. The geometry of the magnet, in the case of bar magnets, length/diameter (L/D), governs how effective the magnet will be. The aforementioned magnets have energy products of three to six tomes that of ALNICO V in geometry of 1 to 1. When used in a 4 to 1 configuration, their relative levels are nearly the same or less than the ALNICO V. Additionally, many of the exotic materials are extremely temperature sensitive and will demagnetize as the temperature increases. Once a magnetic stirring bar has been placed in a container with a solution, it should be positioned directly over the centre of the drive magnet. The stirring speed should be increased slowly, until the desired vortex pattern is achieved. Should the magnetic stirring bar lose its coupling with the drive magnet because of the speed of the drive magnet or the viscosity of the fluid, it is said t have spun-out. Improperly selected stirring bars are the frequent cause of spin-out, as well as a drive magnet speed that is too fast. Matching the drive and stirring magnet improves results dramatically. The selection of the shape of the magnetic stirring bar also influences the resulting vortex. 626

magnetic stirring bars Alternate names: Spin bars PTFE coated magnetic iron alloys POLYGON & OCTAGON The 3712 series are polygon shape The 3711 series are polygon shape with a centre pivot ring The 3709 series are octagon, coloured, with a centre pivot ring APPROXIMATE WITH PIVOT RING RED YELLOW BLUE SIZE mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 8 x 16 3712058 3711058 3710904 3710905 3710906 8 x 20 3712020 3711078 8 x 25 3712025 3711001 3710910 3710911 3710912 8 x 30 3712030 3711018 8 x 40 3712040 3712240 3710919 3710920 3710921 8 x 50 3712050 3712250 ELLIPTICAL (egg shaped) Provides its own pivot point Designed especially for round bottom flasks APPROXIMATE FOR ROUND SIZE mm BOTTOM FLASK CATALOGUE # 10 x 19 >250ml 3713034 16 x 38 500ml 3713012 19 x 40 1000ml 3713058 19 x 50 2000ml 3713002 KOMET CIRCULUS (dumbbell) Specific usage: Octagonal shape - 21x50mm High energetic samarium-cobalt magnet Generates strong turbulence Produces exceptional power No risk of demagnetization by external magnetic fields Improved efficiency "Problem" liquids Highly viscous mixtures Mixtures containing metal particles in suspension Containers with round or convex bottoms Fast mixing action High turbulence Greater stability Minimal drifting at high speeds CATALOGUE # 3717400 WHITE RED YELLOW BLUE LENGTH mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 32 1B3717000 3717001 3717002 3717003 52 1B3717200 3717201 3717202 3717203 627

magnetic stirring bars SATURN (bulb) Specific usage: Operation: Where powders in a liquid impedes stirring action Large central bulb The large bulb at the bar's center lifts the stirring bar ends while spinning and thereby reduces the surface contact area to allow the bar to spin with decreased drag. LENGTH mm CATALOGUE # 40 3711602 SPINRING Operation: Octagonal shape Removable stabilising ring The stabilising ring keeps the bar centered in the vessel. The action creates a deep vortex without splashing or chattering and resists spinout APPROXIMATE SIZE mm CATALOGUE # 8 x 12 3714005 8 x 25 3714010 8 x 38 3714015 8 x 50 3714020 SPINWEDGE Specific usage: SPINSTAR Specific usage: Operation: To plow up sediment for thorough dispersion of viscous solutions Sharply angled broad faces Strong mixing action APPROXIMATE SIZE mm CATALOGUE # 10 x 13 3712301 10 x 25 3712302 13 x 45 3712300 13 x 50 3712303 To fit exactly into beakers Fits exactly the inside diameter of the beaker Creates a deep vortex at relatively low speeds APPROXIMATE SIZE mm FOR BEAKER CATALOGUE # 10 x 19 100ml 3714610 16 x 38 250ml 3714625 19 x 40 400ml 3714640 SPINPLUS Fast and efficient mixing Stable, quiet operation Operation: Creates a deep vortex APPROXIMATE SIZE mm CATALOGUE # 19 3714434 25 3714410 32 3714414 38 3714412 628

magnetic stirring bars SPINFIN Specific usage: SPINVANE Agitation of liquids in round bottom test tubes, and where other stirring bars cannot be used Fins on top and bottom for complete agitation Will not wobble APPROXIMATE SIZE mm CATALOGUE # 13 x 13 3712612 19 x 16 3712634 16 x 13 3712558 CATALOGUE # Tapered 3713700 Half round 3713600 Triangular 3713400 Triangular 3713500 MAGNETIC PICK-UPS: RETRIEVER RETRIEVER FOLLOWER PE Powerful Alnico magnet Hang-up loop 305mm long CATALOGUE # 9.5mm diameter 318293 PE Long ribbed handle 200mm long CATALOGUE # 9.5 mm diameter 3777500 This retriever is able to remove a magnetic stirring bar without coming into contact with the contents of the vessel. It eliminates contamination of contents and does not need to be cleaned or autoclaved after use. The retriever is held in contact with the vessel where the magnetic stirring bar rests. It is then moved upward with the stirring bar following inside the vessel to a point where it can be grasped 629

magnetic stirring bars FLEXIBLE RETRIEVER Specific usage: POSITIONER/RETRIEVER Specific usage: Operation: ARRESTER Specific usage: Operation: Retrieving magnetic stirring bars from containers or from non-magnetic sink drains and traps PTFE Flexible rod 330mm long Hanging loop Chemical resistant PE Position the stirring bar exactly where you want it without splashing. Remove bars without touching or pouring out contents of the vessel Hanging loop 305 mm long 16 mm diameter To pick up a stirring bar, hold the polyethylene retriever down; to release a stirring bar, slide the retriever up PE To hold a stirring bar in place whilst pouring from a beaker or flask Place the arrester against the bottom of the container WHITE RED BLUE YELLOW CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # Flexible retriever 3777400 3777401 3777402 3777403 Positioner/retriever 3778000 Arrester 3778600 magnifier Plastic 8031055 - the lens folds into the handle MAGNIFICATION DIAMETER. mm CATALOGUE # 3.4 x 50 08031000 10 x 25 08031055 630

manifolds Distribution of, and control of, flow of vacuum in vacuum assemblies 25mm diameter manifold body Ground socket Stopcock of choice Standard 9mm tubing olive Horizontal or vertical outlets Screw thread tubing connector Addition of further ports TYPE LENGTH mm CATALOGUE # 2-port 210 24280 3-port 280 24281 markham distillation unit Specific usage: Operation: Nitrogen determination Evaporator vessel enclosed in a steam jacket Liebig condenser Screw thread tubing connectors Cutting off steam supply to the distillation causes the apparatus to automatically suck back in immediate preparation for the next determination CATALOGUE # ZGA020004 m c cartney bottles Alternate names: Bijou bottles Storage of samples and specimens Neutral glass Flat bottom Screwcap with inner seal NARROW MOUTH WIDE MOUTH CAPACITY ml DIAM. x HEIGHT mm CATALOGUE # CATALOGUE # 7 05ZVN294 14 26 x 53 05ZVN288 28 26 x 84 05ZVN287 05ZVN195 631

measuring cylinders Receive and accurately measure various quantities of liquids Class A volumetric vessel Spout Hexagonal base White enamel graduations Cleaning brush CONFORMITY CERTIFIED CAPACITY ml CATALOGUE # CATALOGUE # 5 0521396070 052210154 10 0521396080 052210160 25 0521396140 052210170 50 0521396170 052210175 100 0521396240 052210180 250 0521396360 052210186 500 0521396440 052210190 1000 0521396540 052210193 2000 0521396630 052210194 Plastic Spout Hexagonal base POLYPROPYLENE PMP (TPX)) CLASS A CLASS B CLASS B CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 10 1K2560 1K1570 25 06647-04 1K2561 1K1571 50 06648-04 1K2562 1K1572 100 06649-04 1K2563 1K1573 250 06650-04 1K2564 1K1574 500 06651-04 1K2565 1K1575 1000 06652-04 1K2566 1K1576 2000 1K2567 1K1577 measuring jugs Decanting of measured amounts of liquids Polypropylene Moulded graduations overprinted in blue CAPACITY ml CATALOGUE # 250 1K1086 500 1K1087 1000 1K1088 2000 1K1089 3000 1K1090 5000 06445-081 632

medicine droppers Transferring liquids drop-by-drop Neutral glass Dropping pipette Rubber teat SIZE mm CATALOGUE # Screwcap 15 x 15 600185 melting point tube Determination of melting points of substances Neutral glass Lipped rim CATALOGUE # 24298 mercury collector Operation: Capture and contain spilled mercury beads To collect spilled mercury quickly, unscrew the lid with the foam pad the pad. When the lid is screwed back onto the jar, the pad is compressed against the jar s free-standing perforated plate, releasing the mercury into the jar bottom CATALOGUE # Collector 1B36250 Spare foam pad 1B636251 633

microscope glasses Mounting and covering of samples or specimens on microscope slides SIZE mm PACK SIZE CATALOGUE # COVER SLIPS 15 x 15 100 05CS1515 18 x 18 05CS1818 20 x 20 05CS2020 22 x 22 05CS2222 22 x 40 05CS2240 22 x 50 05CS2250 24 x 24 05CS2424 24 x 40 05CS2440 SLIDES: Frosted 26 x 76 50 05MS7525 Plain 26 x 76 05MS7626 STORAGE SYSTEMS: ABS/PS BOX Accommodates 25, 50 and 100 slides CATALOGUE # Numbered slots 25 place 1K276 Fit into the unit draw 50 place 1K277 100 place 1K278 DISPENSER Operation: MAILER Accommodates 50 slides Dust cover Rotate the knurled knob on the side of the base. Rubber rollers ease out the slides which may then be handled on the edges CATALOGUE # 1K540 Polypropylene Can also be used as a 12ml specimen vial CATALOGUE # 1K922 TRAY Accommodates 100 slides Numbered slide cavity CATALOGUE # 1K921 Dust cover 1K920 UNIT Five draws Addition of more draws 420x420x725mm Removable top lid Additional draws Slide tray (10 per draw) for 100 slides Set of four castors CATALOGUE # Dust cover for slide support 1K930 634

mixing cylinders Alternate names: Stoppered measuring cylinders Volumetric vessel for diluting solutions and accurately measuring and mixing several liquids in a given quantity ratio Class A Ground neck socket Plastic stopper Hexagonal base White enamel graduations Glass stopper Cleaning brush CONFORMITY SCHOTT CERTIFIED CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 10 B10 0521618080 25 B14 0521618140 052340170 50 B19 0521618170 052340175 100 B24 0521618240 052340180 250 B29 0521618360 052340186 500 B34 0521618440 052340190 1000 B45 0521618540 052340193 2000 B45 0521618630 moisture trap In distillation apparatus assemblies B24 ground neck socket and cone Glass key stopcock Alternate sizes ground neck socket and cone PTFE key stopcock CATALOGUE # 24064 moreton flasks Improved stirring caused by the indentations B24 ground neck socket Indentations for increased agitation Round bottom Stopper CAPACITY ml CATALOGUE # Cleaning brush 500 24110445 1000 24110546 2000 24110636 635

mortars & pestles Crushing and grinding solids Porcelain and melamine PORCELAIN MELAMINE CAPACITY ml DIAMETER mm CATALOGUE # CATALOGUE # 07600420 100 07600527 130 07600528 160 07600530 500 500 0672998 multi-neck flasks Multi-function apparatus assemblies Ground neck socket Round bottom Choice of angled or parallel necks Alternate size ground neck sockets Flat bottom Stopper Cleaning brush 2 NECKS 3 NECKS CAPACITY ml CENTER NECK mm SIDE NECK/S mm CATALOGUE # CATALOGUE # 50 B14 B14 242021733 242031333 100 B19 B14 242022443 242034433 100 B24 B14 242022453 242032544 250 B19 B14 242023643 242033433 250 B24 B14 242023653 242033533 250 B19 B19 242033544 250 B29 B14 242023663 242033633 250 B29 B19 242033644 500 B19 B14 242024443 500 B24 B14 242024453 242034533 500 B24 B19 05242034544 500 B29 B14 242024463 242034633 500 B29 B19 242034644 1000 B24 B14 242025453 242035433 1000 B24 B19 242035544 1000 B29 B19 242035644 1000 B29 B19 242035666 2000 B24 B14 242025463 2000 B24 B19 242036544 2000 B29 B14 242026363 2000 B29 B19 242036644 2000 B34 B14 242026373 nessler cylinders Alternate names: RACK Comparison tubes Comparison of liquids to a standard. Soda-lime glass Matched pair Flat bottom Spout Ring marks at 50ml and 100ml Polypropylene Easy snap together assembly Lower deck has reflective surface CAPACITY ml DIAM. x HEIGHT mm CATALOGUE # 100 31 x 200 05NT-100 18986 636

nmr sample tubes Contain samples in NMR spectroscopy 5mm diameter Three qualities available, each meeting the highest requirements Every tube is subjected to a Laser Check System and is individually tested against its own particular specification Coloured caps QUALITY PACK SIZE CAMBER mm CATALOGUE # Economic 250 0.07 23170117 Professional 250 0.03 23170211 Scientific 5 0.013 23170314 NMR guarantees reproducible spectra Various investigations have shown that the specifications of NMR tubes that have been available in the past were often not capable of ensuring a good quality of spectrum. A new range of NMR tubes has now been developed which caters for all the quality criteria for obtaining optimum spectra that were only conceivable before. What is so interesting about NMR tubes that it is worth writing about? Now all NMR users know how very much the quality of their spectra depend on the quality of the sample vessel they are using. There are initially two reasons for this: The sample tube is also measured as part of the measuring process. This means that its material and geometry properties should have preferably no influence on the measurement or at least an influence which can be eliminated by calculation. The sample vessel itself is in an inaccessible position in the measuring instrument during the measurement process, namely in the middle of the magnet. It should not be disturbed there under any circumstances since it is very difficult to interfere with it in this position. The material and dimensions of NMR tubes are subject, therefore, to very stringent requirements and they are accordingly expensive to manufacture. Before a new range of NMR sample tubes comes on the market, a large number of tests have to be carried out before the products agree with the specifications laid down. Then, when they are in full production, measures have to be implemented to ensure that the specifications laid down are adhered to. NMR quality criteria The decisive factor for the quality of a spectrum is how accurately the magnetic field is adjusted to the sample in the NMR tube. As this adjustment (or shimming) can be a complicated process, both the absolute geometry of the tube and the comparability of different tubes are a important quality criteria. For this reason, the adjustments between the different tubes, e.g. in the sample changer, should be as identical as possible. Shimming is then only required once and not for each tube. From this the various quality criteria for a good NMR tube can be derived: Identical sample quantities should come to the same level in several tubes in the sample changer. Otherwise the magnetic field must be readjusted. All tubes should have the same diameter as far as possible. The wall thickness should be the same at every point. The tube must be straight. All the tubes must sit firmly in the spinner without moving and must be a good fit. The tubes should be robust so that they cannot be damaged in the NMR unit. The glass should be chemically resistant and inert to all samples. The glass may not contain any paramagnetic impurities that can result in problems in the spectrum. The tubes must be labeled so that different qualities can be clearly distinguished. Nowadays, many samples are measured without rotating them as in former times. The reason here too can be found in the homogeneity of the magnetic field. If they are not rotated completely evenly the result is a worse spectrum. It is, therefore, better in many cases to compensate for any irregularities by shimming. However, it is even better to ensure that as few irregularities as possible occur with an accurately specified quality. Most NMR spectroscopy workers have got used to rolling NMR tubes on a flat surface as a rough test. This way of sorting out the bananas makes sense as a preliminary test in practice, but of course it is not adequate for production development and production control purposes. 637

parafilm Wrapping and sealing samples CATALOGUE # 08PM996 pasteur pipettes Taking up a small amount of liquid for transfer Neutral glass Rubber teat LENGTH mm CATALOGUE # Pack size: 250 150 05PP150 230 05PP230 Polyethylene Pack size: 500 CAPACITY ml CATALOGUE # 1.5 1K88336 5.0 1K88337 Can be deep-frozen with contents. Tips can be heat-sealed to from a closed ampoule. Ideal for aliquots TEAT CAPACITY ml CATALOGUE # 3ml 086660141 pear shape flasks Micro and semi-micro distillation assemblies Ground neck sockets B14 ground cone on side arm of 24198 series Alternate size ground joints SINGLE NECK WITH SIDE ARM DOUBLE NECK TRIPLE NECK CAPACITY ml SOCKET mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 50 B14 0524195173 24198173 24196173 24197173 50 B19 24195174 24198174 24196174 24197174 100 B14 24195243 24198243 24196243 24197243 100 B19 24195244 24198244 24196244 24197244 100 B24 24195245 24198245 24196245 24197245 638

petri dishes Biological and medical applications especially in microscopical studies Lid Neutral glass DIAM. x HEIGHT mm CATALOGUE # 60 x 15 054006015 100 x 15 054010015 Polystyrene Pack size: 500 pipette tips STERILE NON-STERILE DIAMETER mm CATALOGUE # CATALOGUE # 65 0611265 0611165 90 0611290 0611190 Attaching to pipettors for dispensing Polypropylene Universal fitting for most popular brands of pipettors Pack size: 1000 CAPACITY ml COLOUR CATALOGUE # 2-200 Yellow 1K960 100-1000 Blue 1K961 639

pipettes Accurate measurement and recharging of liquids Class AS Colour code rings Graduated, 0 at top Calibrated to deliver for a reference temperature of 20 º C Pipette filler Do not fill by mouth - use a suitable pipette filler Insertion of cotton wool will prolong evacuation time MEASURING, GRADUATED, TRANSFER Soda-lime glass CERTIFIED CAPACITY ml COLOUR-CODE CATALOGUE # CATALOGUE # 0.1 2 x green 0563336111 0.2 2 x blue 0563336112 0.5 2 x yellow 05711101211 051101129 1 yellow 05711102211 051101133 2 black 05711103211 051101141 5 red 05711104211 051101153 10 orange 05711106211 051101160 20 2 x yellow 051101165 25 white 05711107211 051101170 50 nil 05711108211 Polypropylene SINGLE USE STERILE CAPACITY ml COLOUR-CODE CATALOGUE # CATALOGUE # CATALOGUE # 1 yellow 06163094 06160119 06160110 2 green 06163194 06160219 06160210 5 blue 06163294 06160519 06160510 10 orange 06163394 06161019 06161010 25 red 06162510 VOLUMETRIC, BULB CERTIFIED CAPACITY ml COLOUR-CODE CATALOGUE # CATALOGUE # 0.5 2 x black 0571200122 050340129 1 blue 0571200222 051340133 2 orange 0571200322 051340140 5 white 0571200422 051340155 10 red 0571200522 051340160 20 yellow 0571200622 051340165 25 blue 0571200722 051340170 50 red 0571200822 051340175 100 yellow 0571200922 051340180 Polypropylene CAPACITY ml CATALOGUE # 1 06164094 2 06164194 5 06164294 10 06164394 25 06164494 50 06164594 640

pipettes - fillers PIPETTE BALLS (PRO-PIPETTE) - A Moulded 60ml rubber bulb with three glass ball valves that can be controlled by finger pressure. Suitable for use with all liquids except those that attack rubber PIPEO ELECTRONIC - B Pipette handling made simple and comfortable. Ergonomic light weight handle and excellent balance contribute to operating ease. Freely and precisely adjust the speed of liquid discharge with one hand, using the two easily accessible buttons. A 50ml pipette can be filled quietly and with minimum vibration in less than 10 sec Can be set to release liquid either in gravity delivery or blow-out mode using the rechargeable battery-operated motor. A LED lamp changes from green to red approx. two hours before recharge is necessary and the Pipeo can still be used during recharging. Handles pipettes up to 100ml MANEUS - C Allow other left and right handed operation easily, tirelessly and safely with all common pipettes from 0.1ml to 100ml. Easy handling with high sensitivity lets even inexperienced users to set the meniscus precisely. Easy to dismantle, very simple to clean and completely autoclavable PIPETTE PUMPS (PI-PUMP) - D Suction and dispensing is achieved by rotating the thumb wheel. A pressure lever ensures all liquid is evacuated. Available in three different volumes, each colour coded for easy identification. Made of polypropylene. PLUNGER - E Comfortable grip. Press the plunger and release to fill pipette. The knurled cap adjusts the plunger stroke for repeating preset volume. A rubber chuck holds pipettes securely and safely. Handles pipettes up to 10ml. Graduations on the body VADOSA - F Safety pipetting device, easy to use, delivering the smallest quantities with precision and speed. It can draw up and measure any liquid, even the most viscous ones Fits every type and size of pipette from 0.1ml to 25ml. Simple one handed operation with no hand squeezing, sucking or guessing. Made of polypropylene ECONOMY PIPETTE PUMPS - G The ergonomic design enhances comfort, utility and precision dispensing while reducing repetitive and awkward pipetting motions. This lightweight device provides accurate, trouble free pipetting with simple, one-handed operation. The optimally located thumb wheel rotates easily for precision aspirating or dispensing, down to a volume of one drop at a time all while using a more relaxed grip. The thumb wheel also can be used to "blow out" the pipette. Available in three different pipette volumes, each colour coded for easy identification. It resists acids, alkalis and most solvents and can be easily disassembled for cleaning. Over all length 171 mm A CAPACITY ml CATALOGUE # Standard 0-10 08104099 Universal 10-100 08104199 B CATALOGUE # 1631500 E CATALOGUE # 1K198 C F CATALOGUE # CAPACITY ml CATALOGUE # 061630500 >25 1K199 D G CAPACITY ml CATALOGUE # CAPACITY ml CATALOGUE # 2 37897 2 3790202 10 37898 10 3790210 25 37899 25 3790225 641

pipettes - holders RACKS DRAW TRAYS CONFIGURATION CATALOGUE # PLASTIC 94 Rotary 1K261 Box 1K255 WOOD 12 Horizontal 80509 12 Vertical 80501 24 Vertical 80500 L x W x H mm CATALOGUE # PVC 420 x 300 x 30 1K252 285 x 215 x 40 1K996 pressure equalising funnels Operation: Addition of measured amounts of liquid at a set rate under vacuum. Solvent trap to facilitate recovery at the end of a soxhlet extraction Pressure equalisation side tube Ground cone and socket Glass-key stopcock Plastic stopper Alternate size ground cone and socket PTFE-key stopcock Spindle valve The side tube allows equalisation of pressure between the funnel and vessel Cleaning brush GLASS KEY PTFE KEY CAPACITY NECK CATALOGUE # CATALOGUE # 50ml B14 24125173G 24125173T 100ml B14 24125243G 24125243T 250ml B29 4125366G 24125366T 500ml B29 24125446G 24125446T 1000ml B29 24125546G 24125546T 2000ml B29 24125636G 24125636T 642

pumps WATER-JET VACUUM Evacuation of vessels such as Buchner flasks. Can also be used to vacuum up spilled chemicals Polypropylene HAND Break-apart for easy cleaning Integral non-return valve to prevent back-streaming Evacuation of 5 litres in 20 minutes Withstands pressure up to 10 bar High impact polystyrene Pressure gauge Pumping rate is 15 ml per stroke Attains a vacuum of 625 mm Hg (25") Built in vacuum release valve Nozzle fits standard 6 mm (1/4") i.d. tubing CATALOGUE # 1K1395 Can be used as pressure pump by transferring release valve cap to vacuum port CATALOGUE # 1K1398 pycnometers Alternate names: GAY-LUSSAC Density bottle. Specific gravity bottle Ground neck socket Matched ground-in glass capillary stopper Conforms to DIN 12797 TEMPERATURE MONITORED Ground neck socket Adjusted and calibrated Side capillary tube with cap Conforms to DIN 12810 Temperature range 100 º C-350 º C Ground-in thermometer TEMPERATURE GAY-LUSSAC MONITORED CAPACITY ml CATALOGUE # CATALOGUE # 25 0575100261 0575110251 50 0575100361 0575110351 643

reaction vessels Reactions in apparatus assemblies Ground flat flange vessel Flange retaining clip Lid to order - sockets and sizes Addition of jacket with inlet and outlet tubing connections to order Silicone grease Cleaning brush CAPACITY ml CATALOGUE # 100 2410124 250 2410136 500 2410144 1000 2410154 2000 2410163 Flat flange reaction vessels may be used to operating wall temperatures up to 250ºC but the temperature difference in the glass should not exceed 300ºC Vessels and lids available separately FLAT FLANGE LIDS QUICK RELEASE CLAMP SOCKETS CATALOGUE # When ordering please state the number of sockets 1 24306 required and their sizes 2 24307 3 24308 4 24309 SIZE mm CATALOGUE # 60 082907134 100 082907146 644

reagent bottles Storage of reagents, etc. Soda-lime glass Ground neck socket Glass stopper Cleaning brush NARROW NECK CLEAR AMBER CAPACITY ml NECK mm CATALOGUE # CATALOGUE # 30 B12 0523165150 0523168150 50 B14 0523165170 0523168170 100 B14 0523165240 0523168240 250 B19 0523165360 0523168360 500 B24 0523165440 0523168440 1000 B29 0523165540 0523168540 2000 B29 0523165630 0523168630 10000 B60 0521164860 0521167860 20000 B60 0521164910 0521167910 WIDE NECK CLEAR AMBER CAPACITY ml NECK mm CATALOGUE # CATALOGUE # 30 B19 0523185150 0523188150 50 B24 0523185170 0523188170 100 B29 0523185240 0523188240 250 B34 0523185360 0523188360 500 B45 0523185440 0523188440 1000 B60 0523185540 0523188540 2000 B60 0523185630 0523188630 Polypropylene Neck socket Plastic stopper Cleaning brush NARROW NECK WIDE NECK CAPACITY ml NECK mm CATALOGUE # NECK mm CATALOGUE # 100 B14 061003-94 B29 061015-94 250 B19 061004-94 B34 061016-94 500 B24 061005-94 B45 061017-94 1000 B29 061006-94 B60 061018-94 2000 B29 061007-94 B60 061019-94 645

receiver tubes Small scale filtrations Round bottom Side arm with standard 9mm tubing olive Beaded rim Ground socket Screwthread and cap Screw thread tubing connector on side arm retort rings SIZE mm CATALOGUE # 16 x 125 241941 18 x 150 241942 24 x 150 241943 30 x 180 241944 40 x 250 241945 Supporting funnels etc. on laboratory scaffold or retort stand Galvanised steel Bosshead Retort stand SIZE mm CATALOGUE # 80mm 08080318 100mm 08080320 scalpel Dissecting Stainless steel CATALOGUE # Blades (N0. 23) 93706 KENSB23 scissors Dissecting Stainless steel 125mm CATALOGUE # 93902 646

scoops & spoons Scooping of powder for sampling and transfer from wide mouth containers Polyethylene Stand flat CAPACITY ml LENGTH mm CATALOGUE # 15 115 06400-93 25 135 06401-93 65 185 06402-93 110 215 06403-93 150 250 06404-93 STERILE Polystyrene Individually sterilized and sealed in a polyethylene bag Issued with individual certificates of sterilisation and production number for accurate traceability The 3692 series has a specially designed detachable lid thus eliminating the need for a sampling bag Remain upright when filled or empty To use the 3692 series simply remove the scoop from the bag and detach the lid using the convenient tab. After taking the sample replace the snap-on lid and use the scoop as a container for transport Can be used as weighing boats WHITE RED WITH LID CAPACITY ml LENGTH mm CATALOGUE # CATALOGUE # CATALOGUE # 60 203 369020 369022 369220 125 221 369040 369044 369240 250 216 369060 369068 scribe pen Inscribing on glass, ceramics and plastic Retractable tungsten carbide tip Pocket clip CATALOGUE # 1B44150 647

seals In screw caps. Suba seal for bottles and tubes. The seals can also be used as septums for piercing Silicone rubber CAP THREAD SIZE SIZE mm CATALOGUE # HOLE DIAM. mm CATALOGUE # GL14 12 082924605 6 082923406 GL18 16 082924606 6 082923506 GL25 22 082924609 8 082923708 GL32 29 082924608 10 082923610 12 082923612 GL45 42 082924610 26 082923826 SUBA SEAL Operation: Natural rubber Ringed section for complete sealing Flap section Insert the ringed part into the bottle neck or tube and bend the flap down over the bottle neck or tube SIZE mm CATALOGUE # 14 082410814 sedimentation cone Alternate names: Imhoff cone Sewage analysis Styrene-acrylonitrile Moulded graduations Screwcap at tip CAPACITY ml HEIGHT mm CATALOGUE # 1000 475 0675991 STAND 1K1056 648

separating cylinder Order requirements: Oil separation Ground socket Round base Stopcock 250ml capacity Ground socket size Stopcock type CATALOGUE # 24052 separating funnels - glass Draining of separated layers of liquids in a mixture from heaviest to lightest Ground neck socket Stopcock Plastic stopper Drip tip outlet Spindle valve Alternate size socket Amberise Ground cone outlet Side arm Glass stopper Cleaning brush Stand PEAR SHAPE SQUIBB PATTERN GLASS KEY PTFE KEY GLASS KEY PTFE KEY CAPACITY ml SOCKET mm CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 50 B19 052429417G 052429417T 0561165101 0561165620 100 B19 052429424G 052429424T 0561165102 0561165621 250 B24 052429436G 052429436T 0561165103 0561165622 500 B29 052429444G 052429444T 0561165104 0561165623 1000 B29 052429454G 052429454T 0561165105 0561165624 2000 B29 052429463G 052429463T 0561165106 0561165625 CATALOGUE # ROTARY STAND for 10 x 100,250ml funnels 18963 ROTARY STAND for 6 x 500,1000ml funnels 18964 ADJUSTABLE RACK 18967 649

separating funnels - plastic Draining of separated layers of liquids in a mixture from heaviest to lightest Polypropylene and PMP(TPX)) Neck socket Stopper Stopcock 1K978 can be dismantled for easy cleaning CAPACITY ml SOCKET mm CATALOGUE # PP 125 B19 14810 PP 250 B19 14811 PMP 500 B29 1K978 spatulas Transferring small amounts of powders Stainless steel SIZE mm CATALOGUE # Chattaway, double 150 08073405 Chattaway, micro 210 08073407 Chattaway, single 150 08073411 Nuffield 130 08073400 Nuffield HK 140 08073403 Spoon/flat 150 08073401 MICRO WEIGHING SET Contents: Forceps Two double spatulas Four spoon/spatulas Pouch Each piece 150mm long CATALOGUE # 1B36705 VIBRATING SPATULA PLASTIC Toothed thumb wheel causes vibration when moved Brown FEP coated tip to reduce sticking losses Polyamide with fibre-glass filling LENGTH mm CATALOGUE # DOUBLE 150 1K594 SPOON/FLAT 180 1K596 STIRRING SPATULA, POLICEMAN Polypropylene Flattened ends. Length 245mm CATALOGUE # 08828 650

splash heads Operation: To prevent carry-over of liquid splashes in distillations. Introduction of steam into flasks Standard 9mm tubing olives Ground sockets and/or cones Alternate socket and/or cone Drip tip Length of arm Screwthread tubing connector Fits between a flask and a condenser CODE JOINTS mm CATALOGUE # VERTICAL SH17/23 B19/B24 2417245 SLOPING SH7/02 B19 241734 SH7/43 B24 241735 SH7/0/44 B29 241736 LONG ARM SH7/12 B19 2417444 SH7/13 B24/B19 2417454 SH7/53 B24 2417455 VACUUM B24/B19 2417554 SH7/23/SC B24/B19 2417645 SH7/25/SC B34/B19 2417745 spreader Spreading powders or gels over a surface Coat hanger shape 5 x 205 x 58mm CATALOGUE # Flame polished ends 24301 springs Holding joints with hooks on glassware. Supplied in pairs Stretch Looped ends SIZE mm CATALOGUE # 25 0824107 200 08LS2006 651

staining jars & trays Holding microscope slides for staining Soda-lime glass Tray - boro-silicate glass SIZE mm CATALOGUE # COPLIN 45 x 100 0523319 HELLENDAHL 90 x 40 x 90 0523314 60 x 60 x 100 0523315 SCHIEFFERDECKER 90 x 70 x 40 0523316 STAINING TRAY + HANDLE 88 x 40 x 70 23317 STORAGE BOX 108 x 90 x 70 23318 PMP(TPX)) SIZE mm CATALOGUE # 81 x 101 x 70 1K353 RACK (polypropylene) 1K354 HELLENDAHL 58 x 53.5 x 86 1K355 SCHIEFFERDECKER 85 x 70 x 50 1K351 79.6 x 92 1K1100 STORAGE BOX 1K1101 stands Supporting of apparatus The tripod stand is powder coated steel with a triangular top The quadruped stand is made of chrome nickel and the top is recessed to receive a Ceran plate The retort stand base is powder coated cast iron with a threaded hole to receive a stainless steel threaded rod The electrode holder has a flexible arm with molded acetyl copolymer links and ball-and-socket joints. One end has a 12.7mm diameter stainless steel pin for attachment to a clamp or base. The base has 13mm rod-holding wells with thumbscrews at the centre of each edge SIZE mm CATALOGUE # TRIPOD 08080400 QUADRUPED 082907753 RETORT STAND 500 08080301 750 08080302 FLEXIBLE ELECTRODE HOLDER 23x16 183152 FLEXIBLE ARM & BASE 460 183171 652

still heads Alternate names: Distillation heads Connecting flasks to condensers in distillation assemblies Ground sockets and/or cones The extra sockets on the 24180 and 24181 series allow the acceptance of dropping funnels, stirrers and thermometers etc. Alternate size socket and/or cone Screw thread inlet for thermometer Retaining hooks and springs Thermometer adapter Screwcap for thermometer Thermometer CODE CONES mm CATALOGUE # RECOVERY SH1/11 B14 2417833 SH1/22 B19 2417844 SH1/23 B24 & B19 2417845 SH1/33 B24 2417855 B29 & B24 2417846 SH1/44 B29 2417866 VERTICAL RECOVERY SH2/11 B14 2417933 SH2/22 B19 2417944 SH2/23 B24 & B19 2417945 SH2/33 B24 2417955 B14 SOCKET INLET SH4/1 B14 2418033 SH4/22 B19 2418044 SH4/23 B24 & B19 2418045 SH4/33 B24 2418055 SH4/24 B29 & B19 2418046 SH4/44 B29 2418066 CLAISEN, SH6/1 B14 2418133 B14 SOCKETS SH6/22 B19 2418144 SH6/23 B24 & B19 2418145 SH6/33 B24 2418155 SH6/44 29/32 2418166 VIGREAUX, QD-3050 B14 2418233 B14 SOCKETS B19 2418244 B24 & B19 2418245 B24 2418255 B29 2418266 CLAISEN-VIGREAUX, QD-3040 B14 2418333 B14 SOCKETS B19 2418344 B29 2418345 B24 2418355 B29 2418366 653

stirring rods Agitating and stirring of liquids Flame polished ends Rubber policeman on SR1805RT SIZE mm CATALOGUE # 3 x 150 SR1503 4 x 150 SR1504 4 x 200 SR2004 5 x 150 SR1505 5 x 180 SR1805RT 5 x 200 SR2005 5 x 300 SR3005 6 x 150 SR1506 6 x 300 SR3006 6 x 450 SR4508 8 x 100 SR8100 8 x 150 SR1508 8 x 200 SR2008 8 x 250 SR2508 8 x 300 SR3008 10 x 300 SR30010 10 x 400 SR40010 10 X 500 SR50010 PVC with metal core SIZE mm CATALOGUE # 250 x 8 804-97 stohlman flask Alternate names: Shaking flask Shaking apparatus. Ring mark at 500ml Beaded rim Long neck 24mm id Flat bottom Alternate capacity Ground neck socket Rubber bung CATALOGUE # 2411944 654

stopcocks Alternate names: Taps Releasing liquids from vessels and flow-closing or reduction in air and water lines in apparatus assemblies Glass barrel - ground for glass key, polished for PTFE key Keys of same size barrels are interchangeable Tubes can be bent to suit application CATALOGUE # SINGLE, GLASS KEY, 12.5/2.5 042864036 SINGLE, GLASS KEY, 14.5/2.5 042864048 SINGLE, GLASS KEY, 14.5/4 042864054 SINGLE, GLASS KEY, 18.8/6 042864072 SINGLE, PTFE KEY, 12.5/2.5 042864128 SINGLE, PTFE KEY, 14.5/2.5 042864134 SINGLE, PTFE KEY, 14.5/4 042864136 SINGLE, PTFE KEY, 18.8/4 042864138 HIGH VACUUM, GLASS KEY 042864106 DOUBLE OBLIQUE, GLASS KEY, 14.5/2.5 042864228 DOUBLE OBLIQUE, GLASS KEY, 18.8/4 042864250 DOUBLE OBLIQUE, PTFE KEY, 14.5/2.5 042864242 DOUBLE OBLIQUE, PTFE KEY, 18.8/4 042864256 THREE WAY (T), GLASS KEY, 18.8/2.5 042864184 THREE WAY (T), PTFE KEY, 18.8/2.5 042864198 SPINDLE VALVE, GU, 0-2.5 042860585 SPINDLE VALVE, GU, 0-4 042860586 SPINDLE VALVE, VACUUM, 0-4 042860568 stoppers - glass Solid: soda-lime glass Hollow: boro-silicate glass Ground cone SOLID CLEAR SOLID AMBER HOLLOW CLEAR SIZE mm CATALOGUE # CATALOGUE # CATALOGUE # B7 082162401 B10 082162402 B12 082162404 05243042 B14 082162406 082162706 05243043 B19 082162407 082162707 05243044 B24 082162408 082162708 05243045 B29 082162409 05243046 655

stoppers - plastic Polypropylene Ridged shank Hexagonal grip top stoppers - rubber SIZE mm CATALOGUE # B10 08906-94 B12 08907-94 B14 08908-94 B19 08908-94 B24 08910-94 B29 08911-94 B34 08912-94 B45 08913-94 TUBING CONNECTORS B29 1K1816 Alternate names: Sizes: Bungs Natural rubber except the *grey which are silicone rubber The diameter of the bottom of the bung is given first followed by the top measurement and then the length SIZE mm CATALOGUE # 5x7x16 08SRR050816 7x10x20 08SRR071020 8x10x20 08SRR081020 9x13x20 08SRR091320 11x13x20* 08SRG111320 11x13x20 08SRR111320 11x14x25 08SRR111419 13x16x25 08SRR131625 15x18x25 08SRR151825 17x21x25* 08SRG172125 17x21x25 08SRR172125 19x23x28 08SRR192328 21x25x28 0872613 23x26x28 08SRR293332 25x28x26 08SRR252826 19X26x28 1K1138 31x36x35 08SRR334136 32x37x35 08SRR354535 28x37x37 1K1142 37x42x42 08SRR374242 37x48x50 1K1145 52x65x70 1K1148 656

storage bottles - plastic Storage of laboratory reagents Polyethylene Screwcap WIDE MOUTH WIDE MOUTH NARROW MOUTH ROUND ROUND SQUARE SQUARE NATURAL GRADUATED GRADUATED GRADUATED CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 25 1K608 50 06WM50 1K408 0609-89 1K609 100 0693489 1K409 06924-89 1K610 5010024 250 06WM250 1K410 06926-89 1K611 5025038 500 06WM500 1K411 06927-89 1K612 5050038 1000 06WM1000 1K412 06928-89 1K613 5100038 1500 06WM1500 2000 06WM2000 1K413 1K614 sugar flasks Analysis of sugar solutions in a dilution of 1 in 10 Beaded rim Long neck Flat bottom Ring marks at volume level and 10% more for correct dilution Addition of ground socket Rubber bung Cleaning brush CAPACITY ml CATALOGUE # 100 24114100 200 24114200 657

swabs Cleaning and sample taking Plastic stick with cotton bud tip Stick attached to closure for transport swab Tube for transport swab PACK SIZE CATALOGUE # PLAIN 100 F155K TRANSPORT 50 F165C syringes Injection or extraction through a septum Plastic SIZE mm CATALOGUE # Pack size: 100 2/3 600902 5 600905 Needles 10 600910 20 600920 50 600950 NEEDLES 18g 81815 tablet tubes Alternate names: Pill or polytop vials Push in plastic stoppers for glass tubes Hinged caps on plastic tubes APPROXIMATE DIAM. x LENGTH GLASS PLASTIC CAPACITY ml mm PACK SIZE CATALOGUE # CATALOGUE # 7 50 x 15 100 T1000 10 50 x 18 100 & 1000 T1001 3010491 11 60 x 18 100 T1002 20 50 x 25 100 & 1000 T1003 3020491 25 60 x 25 100 T1004 30 75 x 25 100 & 1000 T1005 3030491 35 90 x 25 50 T1006 50 1000 3050491 75 500 3075491 100 500 3100491 658

test sieves Separation of solids from water Stainless steel 200mm diameter Supplied with certificate Adapter Receiver Lid Separating pan Wet wash receiver MESH SIZE CATALOGUE # MICRON MESH 20 6020 25 6025 32 6032 38 6038 45 6045 53 6053 63 & 75 6375 90 to 850 6400 MILLIMETER MESH 1 to 3.35 6490 4 to 19 6500 ADAPTER 7201 RECEIVER 7202 LID 7203 SEPARATING PAN 7204 WET WASH RECEIVER 7205 MICRO SIEVE SET Contents: Spares: Operation: Polypropylene Phosphor-bronze mesh inserts Four interchangeable screen holding sections Catch pan Cover Four screen retaining rings Eight phosphor-bronze mesh inserts, one each of eight sizes: 25, 35, 45, 60, 80, 120, 170 and 230 linear openings per inch mesh The holding sections are 55.9mm I.D. x 41mm high with a capacity of about 60ml The complete stack with basin and cover is 72.1mm maximum O.D. x 216mm high Pack of 8 mesh inserts The sections unscrew easily for changing mesh inserts or cleaning thoroughly, and screw together snugly to lock the mesh in place CATALOGUE # SIEVE 37845 659

test tubes - glass Alternate names: Boiling tubes Simple experiments for qualitative chemical analyses. Rimmed test tubes should be used for frequent pouring or shaking Flame-polished rim Round bottom Pack sizes: Soda-lima & neutral glass in packs of 100 *pack of 80 in packs of 10 Rubber bung Plastic cap Cleaning brush Holder Soda-lime test tubes are not recommended for heating RIMLESS NEUTRAL SODA-LIME BORO-SILICATE APPROX. CAP. ml DIAM. X LENGTH mm CATALOGUE # CATALOGUE # CATALOGUE # 6 10 x 75 05TT1075N 05TT1075S 8 12 x 75 05TT1275N 05TT1275S 10 12 x 100 05TT12100N 12 15 x 88 05TT1588S 15 15 x 100 05TT15100S 18 16 x 100 05TT16100N 2419116100 19 16 x 125 05TT16125N 2419116125 20 16 x 150 05TT16150N 2419116150 20 18 x 100 2419118100 30 18 x 150 05TT18150N 2419118150 40 20 x 150 05TT20150N 2419120150 45 24 x 125 05TT24125N 50 24 x 150 05TT24150N 2419124150 RIMMED NEUTRAL SODA-LIME BORO-SILICATE APPROX. CAP. ml DIAM. X LENGTH mm CATALOGUE # CATALOGUE # CATALOGUE # 15 15 x 100 05TT15100SR 18 16 x 100 2419216100 19 16 x 125 05TT16125NR 2419216125 20 16 x 150 05TT16150NR 2419218100 20 18 x 100 2419218100 30 18 x 150 2419218150 40* 20 x 150 05TT20150NR 2419220150 50* 24 x 150 05TT24150NR 2419224150 CAPS Polyurethane Pack size: 100 FOR TUBE SIZE mm CATALOGUE # 12 1K650 16 1K651 18 1K654 24 1K655 30 1K656 35 1K657 40 1K658 660

test tubes - plastic, single use Polypropylene Coloured screw caps: 1K88 series - red, blue, yellow or white caps Conical bottoms on the 1K84 series Pack sizes: 1K84000 & 1K84001-100 1K84002 & 1K84003-150 1K88303-1000 1K88304-100 STERILE STERILE CAPACITY SIZE CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 15ml 16 x 100mm 1K88303 1K88304 15ml 17 X 120mm 1K84000 1K84001 50ml 30 X 115mm 1K84002 1K84003 RACKS CAPACITY & SIZE CATALOGUE # POLYPROPYLENE COLLAPSIBLE 55 x 16mm 063191940 & STACKABLE 55 x 18mm 063192940 40 x 20mm 063193940 IN-LINE 10 x 16mm IK130 9 x 18mm IK131 8 x 20mm IK135 BASE PLATE 156x202mm 1K134 BOX 12 x 21mm 1K560 24 x 21mm 1K562 HOLE 'n PEG 12 08TTR6H6P WOOD 08080200 Spring steel with wooden handle CATALOGUE # HOLDER 08087700 CATALOGUE # BRUSH 08072950 661

thermometers Ascertaining temperatures Solid 6-7mm stem, calibrated for total immersion Yellow enamel backing MERCURY RED SPIRIT RANGE 0 C/TYPE CATALOGUE # CATALOGUE # -10 to + 50/60 08MT050 08ST050-10 to + 110 08MT110 08ST110-10 to + 150 08MT150 08ST150-10 to + 250 08MT250-10 to + 360 08MT360-40 to + 50 max/min 08MMT3050 Soil 08ST80S thimbles Order requirements: Operation: In a soxhlet extractor when it is required that the extracted material be weighed Sintered disc Flame polished rim Porosity of sintered disc The thimble is slid into a soxhlet extractor that has a B34, or bigger, socket SIZE mm CATALOGUE # 26 x 95 240902 36 x 95 240903 662

tilt measures Alternate names: Set: Kipp's measures Dispensing fixed amounts of liquid B24 ground cone Body GL32 screwcap Inner bulb measures Screw cap instead of ground cone Alternate size ground cone Hooks for retaining springs CAPACITY ml CATALOGUE # 1 052400102 2 052400104 5 052400106 10 052400108 15 052400109 20 052400111 25 052400112 30 052400113 40 052400114 50 052400117 SET 2, 5 & 10 2400300 20, 25 & 30 2400400 40 & 50 2400500 timers LCD display Count down and up to 99 minutes Memory storage 08220 has mode select and clock Battery Magnet CATALOGUE # 08221 08220 663

tubing Pack size: Generally for air and water lines in apparatus assemblies Connectors Tubing clamps 15 meter roll ID x OD mm CATALOGUE # LATEX 5 x 10 08202L 6 x 10 08203L 6 X 11 08204L 6 x 13 08206L SILICONE 4 x 7 08200AS 5 x 8 08201S 6 x 10 08203S 6 X 11 08204S 8 x 11 08205S PVC 3 x 5 08200P 8 x 11 08205P NATURAL RUBBER: Red 8 x 11 0670019 Orange 8 x 12 1K3865 NITRILE 8 x 12 0680019 JOINERS For 8mm id tubing CATALOGUE # Polypropylene 042860222 TUBING ID mm CATALOGUE # DISCONNECTOR 6-7-8 1K435 8-9-10 1K436 CONNECTOR 6-7-8 1K511 8-9-10 1K512 Y CONNECTOR 6 1K465 ADAPTERS 4-6-8/10-12 1K877 4-6-8/12-14-16 1K878 8-10-12/14-16 1K879 SCREWTHREAD & KECK QUICK CONNECTORS CATALOGUE # DETACHABLE: Straight 2924704 Bent 2924705 KECK: suction kit 042863431 adapter for Buchner flask 042863450 CLAMPS Stainless steel CATALOGUE # HOFFMAN 86902 MOHR 86910 664

vacuum drying pistol Components: Order requirements: Distillation apparatus assemblies Two round bottom flasks Still head Stopcock/tubing adapter Jacketed drying tube Reversible coil condenser Tubing screw thread connection Hooks for retaining springs Sizes of sockets and cones Stopcock key CATALOGUE # ZGA020012 vigreux flasks Distillation apparatus assemblies Pear shape flask Fractionating column B14 ground neck socket and Side ground cone Alternate ground sockets and cone Hooks for retaining springs CAPACITY ml CATALOGUE # 25 24200025 50 24200050 100 24200100 665

viscometers Obtaining kinematic viscosities of liquids CATALOGUE # BSU REVERSE FLOW 24270 CANNON-FENSKE OPAQUE 24271 CANNON-FENSKE ROUTINE 24272 UBBELOHDE 24273 volatile oil traps Oil separation at the end-stage of a distillation assembly Ground cones and sockets Stopcock with choice of glass or PTFE key Order requirements: Sizes of sockets and cones Stopcock key CATALOGUE # 24063 BRANIGAN 24242 volume dispensers Dispensing measured amounts of liquids Polyethylene and polyurethane Reservoir bottle Graduated dispenser Screwcap Dispensing tube 25ml DISPENSER 50ml DISPENSER CAPACITY CATALOGUE # CATALOGUE # 250ml K1475 K1480 500ml K1476 K1481 1000ml K1477 K1482 666

volumetric flasks - glass Making up and storage of liquids to a fixed volume Class A Calibrated to contain for a reference temperature of 20 º C Ground neck socket Ring mark at volume level Enamel markings Plastic stopper Amberise Glass stopper Cleaning brush CONFORMITY WHITE MARKINGS BLUE MARKINGS CERTIFIED CAPACITY ml NECK mm CATALOGUE # CATALOGUE # CATALOGUE # 5 B7 0521678070 052820152 10 B7 0521678080 052820160 20 B10 0521678120 052820165 25 B10 0521678140 052820170 50 B12 0521678170 052820175 100 B14 0521678250 05732005 052820180 200 B14 0521678320 05732006 052820185 250 B14 0521678360 05732007 052820186 500 B19 0521678440 05732008 052820190 1000 B24 0521678540 05732009 052820193 2000 B29 0521678630 052820194 5000 B34 0521678730 SCREW THREAD NECK Red PBT screwcap CAPACITY ml NECK CATALOGUE # 20 GL14 21678129 25 GL14 21678149 50 GL18 21678179 100 GL18 21678259 200 GL18 21678329 250 GL18 21678369 500 GL24 21678449 1000 GL32 21678549 2000 GL32 21678639 5000 GL32 21678739 667

volumetric flasks - plastic Polypropylene Class B Calibrated to contain for a reference temperature of 20 º C Ring mark at volume level Screw thread neck White screwcap POLYPROPYLENE PMP (TPX) CAPACITY ml NECK CATALOGUE # CATALOGUE # 25 GL18 1K1430 50 GL18 1K1431 1K2490 100 GL18 1K1432 1K2491 250 GL25 1K1433 1K2492 500 GL25 1K1434 1K2493 1000 GL25 1K1435 1K2494 Polypropylene and PMP (TPX) Calibrated to contain for a reference temperature of 20 º C Ring mark at volume level Stopper POLYPROPYLENE PMP (TPX) CLASS A CERTIFIED CAPACITY ml NECK CATALOGUE # CATALOGUE # CATALOGUE # 25 B14 1K1484 50 B14 1K1485 1K2485 100 B14 1K1486 1K2486 0667304 250 B19 1K1487 1K2487 0667404 500 B19 1K1488 1K2488 0667504 1000 B19 1K1489 1K2489 0667604 wash bottles Polyethylene Screwcap Goose-neck tube CATALOGUE # GL25 vent-cap for 500ml VENT CAP 06833019 NARROW NECK WIDE NECK INTEGRAL CAPACITY ml CATALOGUE # CATALOGUE # CATALOGUE # 50 1K179 100 1K180 250 1K182 1K1637 1K1633 500 06950-88 1K1638 1K1634 1000 1K185 COLOURED 500ml RED GREEN YELLOW BLUE CATALOGUE # CATALOGUE # CATALOGUE # CATALOGUE # 061327-03 061327-05 061327-06 061327-08 668

wash bottles - solvent Polyethylene Screwcap Goose-neck tube 500ml Imprint of solvent GL25 vent-cap CATALOGUE # DISTILLED WATER 06133281 ACETONE 06133282 METHANOL 06133283 ISOPROPANOL 06133284 ETHYLACETATE 06133285 ETHANOL 06133286 METHYLENE CHLORIDE 06133287 DIMETHYLFORMAMIDE 06133288 n-heptane 06133289 n-hexane 06133290 PETROLEUM ETHER 06133291 TOLUENE 06133293 XYLENE 06133294 ACETONITRILE 06133295 ACETIC ACID 06133296 METHYLETHYLKETONE 06133297 VENT CAP 06833019 washing head Alternate names: Operation: Sprayer head Fitting to ground necks of bottles and flasks B24 ground cone Forcing air into the pipe expels the washing liquid or solvent from the spout CATALOGUE # 240255 669

watch glasses Evaporation work. Cover for beakers and Erlenmeyer flasks for return of condensation Glass: flame-polished edge Polypropylene: base Soda-lime glass is not recommended for heating BORO-SILICATE SODA-LIME POLYPROPYLENE DIAMETER mm CATALOGUE # CATALOGUE # CATALOGUE # 50 0521321320 05797201 60 0521321340 05797202 70 05797203 80 0521321410 05797204 1K454 90 05797210 100 0521321460 05797205 1K455 125 0521321520 05797206 150 0521321570 05797208 200 0521321610 05797209 weighing boats Alternate names: Weighing scoops Weighing of small amounts of powders and emptying into vessels SINGLE USE Flame polished edges High impact polystyrene CAPACITY ml CATALOGUE # 2 2402802 3 2402803 4 2402804 5 2402805 6 2402806 10 2402810 20 2402820 50 2402850 55 2402855 60 2402860 Pack size: 100 CAPACITY ml CATALOGUE # 1.25 1B367401 2.5 1B367402 5 1B367403 8 1B367404 20 1B367405 670

weighing jars Alternate names: Weighing bottles Weighing of substances on analytical scales. Storage of samples and specimens Also used as moisture crucibles Air-tight lid Remove lids before autoclaving LOW FORM TALL FORM CAPACITY ml DIAM. x HEIGHT mm CATALOGUE # DIAM. x HEIGHT mm CATALOGUE # 5 28 x 25 052421013 28 x 40 052421113 15 38 x 30 052421023 32 x 50 052421118 30 54 x 30 052421032 38 x 70 052421123 80 85 x 30 052421041 44 x 80 052421124 Polypropylene CAPACITY ml DIAM. x HEIGHT mm CATALOGUE # 20 40 x 29 1K342 23 30 x 48 1K340 30 49 x 29 1K345 50 59 x 34 1K346 60 40 x 69 1K343 190 59 x 88 1K347 360 70 x 118 1K348 weighing pipettes Alternate names: Lunge-Rey pipettes Weighing or sampling of fuming or corrosive liquids Stopcock with choice of glass or PTFE key B10 ground cone Matching cover flask Matching cover tube CAPACITY ml CATALOGUE # >10 24029 Order requirements: Stopcock key Cover tube or flask 24089 671

wire gauze On tripod for even distribution of heat and avoidance of soot Galvanised wire mesh with ceramic centre SIZE mm CATALOGUE # 150 x 150 0807330 witt filtration unit Components: Specialised vacuum filtration Reaction vessel Flat flange lid with ground socket Quick release clip (not shown) Tubing screw thread connection Quick connect tubing adapter CATALOGUE # 052473046 woulff bottles Washing gas in apparatus assemblies and in a train Two or three ground necks of equal size Addition of stopcock at base Alternate ground socket sizes Stoppers TWO NECKS THREE NECKS CAPACITY ml NECK CATALOGUE # CATALOGUE # 100 B14 24278024 24279024 250 B19 24278364 24279364 500 B19 24278445 24279445 1000 B24 24278545 24279545 2000 B29 24278636 24279636 672