72h EbC Selenastrum capricornutum 5. 72h NOEC h EC h LC Lepomis macrochirus. 21d NOEC

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1 Dimetoat Fane 1 - Preparat Handelsnavn: Perfekthion Insecticid Tester CasNr: Test-type Test-varighet µg/l Art Litteratur PNEC1 PNEC 7h EbC Selenastrum capricornutum 7h NOEC h EC d NOEC 40 Daphnia magna 96h LC Lepomis macrochirus 1d NOEC Basert på µg/l Usikkerhetsfaktor Verdi (µg/l) AMF basert på PNEC1 Laveste L(EC) MF basert på PNEC LavesteNOEC Vurderingsgrunnlag for usikkerhetsfaktor: PNEC: Kronisk NOEC fra tre trofiske nivå. Daphnia mest følsom - UF=10 PNEC1: Akutt L(E)C0 fra tre trofiske nivå. Daphnia mest følsom UF=100 Tidligere MFI 0, Fane - Tester Alle tester Test-type Test-varighet µg/l Art Litteratur Vis 7h LC h ErD Selenastrum capricornutum 7h EbC Selenastrum capricornutum 7h NOEC h NOEC h EC h LC h LC h EC Mysidopsis bahia 4h EC Daphnia magna 1 1d NOEC 40 Daphnia magna 4h NOEC h LC Cyprinus carpio 4 96h LC0 700 Onchorhynchus 96h LC0 600 Onchorhynchus 96h LC Lepomis macrochirus 96h LC Onchorhynchus 3 1d NOEC h LC0 400 Salmo gairdneri Fane 3 - Kommentarer

2 Dimetoat Fane 4 - r Litteraturreferanser 1 H. Ellgehausen. (1983). Acute toxicity of dimethoate to Daphnia magna (4 hours OECD mobility test). Project No.: 00610; R.C.C.- Research & Consulting Company LTD. Pesticide Ecotoxicity Database, 001. Environmental Fate and Effects Division of the Office og Pesticide programs, U.S.EPA, Washington, D.C. 3 R.Bathe, 198: Acute toxicity to rainbow trout of Dimethoate. Project No,: R.C.C-Research & Consulting Company Ltd. 4 R.Bathe, 198: Acute toxicity to the carp of Dimethoate. Project No.:01370;R.C.C- Research & ConsultingCompany Ltd. Tomline ed. 006: The Pesticide Manual 6 Biologische Bundesanatalt fur Land- und Forstwirtschaft No. 4, 006 Fane - Diverse info om preparatet Godkjenelsesdato: Fornyet godkjenning: 00 Trukket (dato): SpesialAnalyse Metode: 3 M60 Bestemmelsesgrense: 0,01µg/L Dato siste gjennomgang: GC-MULTI Kommentarer

3 Vedlegg for Dimetoat Kilde: Svensk undersøkelse Dimethoate Dimethoate is an organophosphorus insecticide, intended for use in beets. S CH 3 NHCOCH SP(OCH 3 ) 1.1 Physico-chemical properties Physico-chemical properties of dimethoate are summarised in table 1.1. Table 1.1: Physico-chemical properties of dimethoate. Reference CAS-No Empirical formula C H 1 NO 3 PS Molecular weight [g/mol] 9.3 Solubility in water [mg/kg] 3300 at ph, 0 C 3800 at ph 7, 0 C 000 at ph 9, 0 C Vapour pressure [Pa] at C Log P ow Henry s law constant [Pa m 3 /mol] Toxicity to aquatic organisms The toxicity of dimethoate to aquatic organisms is summarised in table 1.. Table 1.: Aquatic ecotoxicity data of dimethoate. Species End-point Exposure duration Result [mg as/l] Reference Molluscs Cassostrea 96 h, flow-through EC virginica Crustaceans Daphnia magna immobilisation 4 h, static EC Daphnia magna mortality and 1 d, semi-static NOEC ) growth Mysidopsis bahia immobilisation 96 h, flow-through EC 0 1 Fish Oncorhynchus mortality 96 h, static LC Oncorhynchus mortality 96 h, static LC 0 6. Oncorhynchus mortality 96 h, static LC 0 7. Lepomis macrochirus mortality 96 h, static LC 0 6.0

4 Cyprinus carpio mortality 96 h, static LC Cyprinodon variegatus mortality 96 h, static LC 0 >110 1) Effect concentration basis for calculation of PNEC. Technical substance. The most sensitive of the tested species was Daphnia magna, with a NOEC of 0.04 mg/l. Supplementary tests on algae, which is not represented in the table above, show that they are less sensitive than daphnia (6). Algae tests, together with the daphnia and fish tests in the table above, show that three tropic levels are available, but only two long-term studies together with the supplementary tests. An assessment factor of 0 is used for calculation of the predicted no effect concentration. Hence, the PNEC for dimethoate is calculated to mg/l. 1.3 Bioaccumulation and persistence Dimethoate is not expected to bioaccumulate. Dimethoate is relatively stable in water between ph -7. In water with ph 9, the substance is primary degraded with a DT 0 of 1 days. Degradation products at ph and 7 were O-desmethyl-dimetoat and O,O-dimethylphosphorothioic acid. 1.4 Proposed water quality objective Since PNEC is mg/l, the proposed water quality objective for dimethoate is mg/l. 1. Comments Dimethoate is very mobile in soil. Both dimethoate and O-desmethyl-dimethoate, are microbially degradable in soil (ph dependent process). O-desmethyl-dimetoat is believed to be more toxic than the parent compound (6). Therefore an additional water quality objective for the metabolite is recommended. 1.6 Literature (1) H. Ellgehausen. (1983). Acute toxicity of Dimethoate to Daphnia magna (4 hours OECD mobility test). Project No.: 00610; R.C.C Research & Consulting Company Ltd. () Pesticide Ecotoxicity Database, 001. Environmental Fate and Effects Division of Office of Pesticide programs, U.S. EPA. Washington, D.C. (3) R. Bathe. (198). Acute toxicity to the carp of Dimethoate. Project No.: 01370;R.C.C Research & Consulting Company Ltd.

5 (4) R. Bathe. (198). Acute toxicity to rainbow trout of Dimethoate. Project No.: ; R.C.C Research & Consulting Company Ltd. () Tomlin, C., 000. The Pesticide Manual, 1 th edition. British Crop Protection Council. (6) Torstensson, L. Ekotoxikologisk värdering av dimetoat. Institutionen för mikrobiologi. Sveriges lantbruksuniversitet.