1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 15028:2012Chemicals used for treatmentof water intended for humanconsumption SodiumchlorateCopyright European Committee for Standardization Provided by IHS under license wi
2、th CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15028:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 15028:2012. It supersedes BS EN 15028:2006 which is withdrawn.The UK participation in its preparation was en
3、trusted to Technical Committee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its corre
4、ct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013ISBN 978 0 580 77701 1 ICS 13.060.20; 71.100.80 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Pol
5、icy and Strategy Committee on 28 February 2013.Amendments issued since publicationDate T e x t a f f e c t e dCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15028:2012EURO
6、PEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15028 November 2012 ICS 71.100.80 Supersedes EN 15028:2006English Version Chemicals used for treatment of water intended for human consumption - Sodium chlorate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Ch
7、lorate de sodiumProdukte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Natriumchlorat This European Standard was approved by CEN on 16 September 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standa
8、rd 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English,
9、 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulg
10、aria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tu
11、rkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN
12、 15028:2012: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15028:2012EN 15028:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Descri
13、ption .54 Purity criteria 85 Test methods 96 Labelling - transportation - storage 15Annex A (informative) General information on sodium chlorate . 18Annex B (normative) General rules relating to safety 19Annex C (informative) Environmental, health and safety precautions within chemical laboratory 20
14、Bibliography . 21Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15028:2012EN 15028:2012 (E) 3 Foreword This document (EN 15028:2012) has been prepared by Technical Committ
15、ee 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 May 2013, and conflicting national standards shall be withdrawn at the late
16、st by May 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 15028:2006. Significant technical differen
17、ces between this edition and EN 15028:2006 are as follows: a) Modification of 6.2 on labelling, deletion of the reference to EU Directive 80/778/EEC of 15 July 1980 in order to take account of the latest Directive in force. According to the CEN/CENELEC Internal Regulations, the national standards or
18、ganisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembour
19、g, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from I
20、HS-,-,-BS EN 15028:2012EN 15028:2012 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this European Standard: a) this European Standard provides no information as to whether the product may be used wit
21、hout restriction in any of the Member States of the EU or EFTA; b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. NOTE Conformity with this European Sta
22、ndard does not confer or imply acceptance or approval of the product in any of the Member States of the EU or EFTA. The use of the product covered by this European Standard is subject to regulation or control by national authorities. Copyright European Committee for Standardization Provided by IHS u
23、nder license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15028:2012EN 15028:2012 (E) 5 1 Scope This European Standard is applicable to sodium chlorate used for treatment of water intended for human consumption. It describes the characteristics of
24、sodium chlorate and specifies the requirements and the corresponding test methods for sodium chlorate. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use of sodium chlorate (see Annex B) and gives the environmental, health and safety pr
25、ecautions within chemical laboratory (see Annex C). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edi
26、tion of the referenced document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696) EN ISO 11885, Water quality Determination of selected elements by inductively coupled plasma optical emission spectrometry (ICP-OES) (ISO 118
27、85) EN ISO 12846, Water quality Determination of mercury Method using atomic absorption spectrometry (AAS) with and without enrichment (ISO 12846) ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 8213
28、, Chemical products for industrial use Sampling techniques Solid chemical products in the form of particles varying from powders to coarse lumps 3 Description 3.1 Identification 3.1.1 Chemical name Sodium chlorate 3.1.2 Synonym or common names None (for the processes related to treatment of drinking
29、 water) NOTE Commercial names of formulations might exist. Purity needs to be checked in case of use for treatment of water. 3.1.3 Relative molecular mass 106,45 3.1.4 Empirical formula NaClO3Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo repr
30、oduction or networking permitted without license from IHS-,-,-BS EN 15028:2012EN 15028:2012 (E) 6 3.1.5 Chemical formula NaClO33.1.6 CAS Registry Number 1)7775-09-9 3.1.7 EINECS reference 2)231-887-4 3.2 Commercial form Sodium chlorate is commercially available in crystalline form or as a powder and
31、 as an aqueous solution. 3.3 Physical properties 3.3.1 Appearance and odour The product is a colourless solid as a powder or the product is a faint blue to colourless solution. 3.3.2 Density The density of an aqueous solution of sodium chlorate is given in Table 1. Table 1 Density of sodium chlorate
32、 solution Concentration of aqueous solution of sodium chlorate solution (Mass fraction in %) Density (g/ml at 20 C) 30 1,2440 1,3350 1,443.3.3 Solubility in water The solubility of sodium chlorate in water is given in Table 2. Table 2 Solubility of sodium chlorate Temperature (C) Solubility (g/l) 10
33、 65020 70040 78060 8801)Chemical Abstracts Service Registry Number. 2)European Inventory of Existing Commercial Chemical Substances. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,
34、-,-BS EN 15028:2012EN 15028:2012 (E) 7 3.3.4 Vapour pressure Not applicable (thermal decomposition occurs at 400 C) 3.3.5 Boiling point at 100 kPa 3)The boiling point of aqueous solutions of sodium chlorate is given in Table 3. Table 3 Boiling point at 100 kPaof aqueous solutions of sodium chlorate
35、Concentration of aqueous solution of sodium chlorate (g NaClO3/kg of saturated solution) 400 450 500 550 600 650 700Boiling point (C) 106 107 109 110 111 113 1163.3.6 Crystallisation The crystallisation point of aqueous solutions of sodium chlorate depending on concentration in water is given in Tab
36、le 4. Table 4 Crystallisation point of sodium chlorate aqueous solutions Concentration of aqueous solution of sodium chlorate (mass fraction in %) Crystallisation point (C) 40 -20 45 0 50 20 55 3260 553.3.7 Melting point The melting point (of the solid) is 248 C; and the thermal decomposition is at
37、400 C. 3.3.8 Viscosity (dynamic) The relative viscosity of aqueous solutions of mass fraction of 40 % of sodium chlorate compared with water at the same temperature between 25 C and 35 C is 2,07. 3.3.9 Critical temperature in aqueous solution Not applicable. 3.3.10 Critical pressure Not applicable.
38、3)100 kPa = 1 bar. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15028:2012EN 15028:2012 (E) 8 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties The sodium
39、 chlorate is a strong oxidising agent. NOTE 1 When an acidic sodium chlorate solution is treated with a reducing agent (e.g. hydrogen peroxide (EN 902) or oxalic acid), chlorine dioxide can be formed. NOTE 2 The formation of chlorine dioxide can also be obtained by acidification if the acid applied
40、is capable of acting as a reducing agent in the current environment. For the purpose of drinking water treatment one should use acids of quality in accordance with existing standards for the purpose: hydrochloric acid (EN 939); sulfuric acid (EN 899); phosphoric acid (EN 974). 4 Purity criteria 4.1
41、General This European Standard specifies the minimum purity requirements for sodium chlorate used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. Depending on the raw material and the manufacturing process other impurities m
42、ay be present and, if so, this shall be notified to be user and when necessary to relevant authorities. NOTE Users of this product should check the national regulations in order to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account
43、raw water quality, required dosage, contents of other impurities and additives used in the product not stated in this product standard. Limits have been given for impurities and chemical parameters where these are likely to be present in significant quantities from the current production process and
44、 raw materials. If the production process or raw materials lead to significant quantities of impurities, by-products or additives being present, this shall be notified to the user. 4.2 Composition of commercial product The sodium chlorate is commercially available as solid forms usually with a minim
45、um dry mass fraction of 99 % of NaClO3. Commercial solutions if used for water treatment shall be certified to be made-up on the basis of the product with a dry mass fraction of 99 %. No additional substances like colorants shall be added to the basic product or to the solutions. The content of sodi
46、um chlorate in commercially available solutions shall be within 3 % of the manufacturers declared value. 4.3 Impurities and main by-products NOTE Sodium chlorate in crystalline form contains normally a maximum mass fraction of 0,1 % of sodium chloride (as NaCl). 4.4 Chemical parameters The product s
47、hall conform to the requirements specified in Table 5. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15028:2012EN 15028:2012 (E) 9 Table 5 Chemical parameters Parameter L
48、imit in sodium chlorate (mass fraction 100 %) (mg/kg) Arsenic (As) max. 1 Cadmium (Cd) max. 1 Chromium (Cr) max. 5 Mercury (Hg) max. 1 Nickel (Ni) max. 1 Lead (Pb) max. 1 Antimony (Sb) max. 1 Selenium (Se) max. 1 NOTE Cyanide which does not exist in a strong oxidising medium such as sodium chlorate is not a relevant chemical parameter. Pesticides and polycyclic aromatic hydrocarbons are not by-products of the manufacturing process. For parametric values of sodium chlorate on trace metal content in dr
