SOUTH AFRICAN NATIONAL STANDARD

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1 ISBN SOUTH AFRICAN NATIONAL STANDARD Chemicals used for treatment of water intended for human consumption Chlorine This national standard is the identical implementation of and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: Fax: SABS

2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS/TC 147, Water, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in December Reaffirmed and reprinted in March This document will be reviewed every five years and be reaffirmed, amended, revised or withdrawn. SABS

3 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM Licensed exclusively to SABS. EN 937 January 1999 ICS Descriptors: water, potable water, water treatment, chemical compounds, chlorine, description, physical properties, chemical properties, impurities, toxic substances, tests, labelling, marking, storage, utilization English version Chemicals used for treatment of water intended for human consumption - Chlorine Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Chlore Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Chlor This European Standard was approved by CEN on 2 November CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. E

4 Page 2 Licensed exclusively to SABS. Contents Page Foreword...3 Introduction Scope Normative references Description Identification Commercial form Physical properties Chemical properties Purity criteria Composition of commercial product Impurities and main by-products Toxic substances Test methods Labelling - Transportation - Storage Means of delivery Risk and safety labelling in accordance with the EU directives Transportation regulations and labelling Marking Storage...10 Annex A (informative) General information on chlorine...11 Annex B (normative) General rules relating to safety...13 Annex C (normative) Sampling and analytical methods...14 Annex D (informative) Bibliography...25

5 Page 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 164 "Water supply", the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 1999, and conflicting national standards shall be withdrawn at the latest by July According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

SOUTH AFRICAN NATIONAL STANDARD

ISBN 978-0-626-28107-6 EN 1008:2002 SOUTH AFRICAN NATIONAL STANDARD Mixing water for concrete Specification for sampling, testing and assessing the suitability of water, including water recovered from