1、BSI Standards PublicationBS EN 12932:2015Chemicals used for treatmentof water intended for humanconsumption Chemicalsfor emergency use Sodiumdichloroisocyanurate,dihydrateBS EN 12932:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12932:2015.It supersedes B
2、S EN 12932:2008 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include
3、all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 86479 7ICS 13.060.20; 71.100.80Compliance with a British Standard cannot confer immunity fromlegal obligations.Th
4、is British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 12932:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12932 March 2015 ICS 71.100.80 Supersede
5、s EN 12932:2008English Version Chemicals used for treatment of water intended for human consumption - Chemicals for emergency use - Sodium dichloroisocyanurate, dihydrate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Produits chimiques utiliss en cas durgenc
6、e - Dichloroisocyanurate de sodium dihydrat Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Produkte fr den Notfall - Natriumdichlorisocyanurat-dihydrat This European Standard was approved by CEN on 20 December 2014. CEN members are bound to comply with the CEN/CENELEC Internal R
7、egulations 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 CEN-CENELEC Management Centre or to any CEN m
8、ember. 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 CEN-CENELEC Management Centre has the same status as the official versions
9、. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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, Pola
10、nd, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation
11、in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12932:2015 EBS EN 12932:2015EN 12932:2015 (E) 2 Contents Page Foreword 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Description .6 3.1 Identification .6 3.1.1 Chemical name .6 3.1.2 Synonym or common name
12、 6 3.1.3 Relative molecular mass .6 3.1.4 Empirical formula.6 3.1.5 Chemical formula .7 3.1.6 CAS Registry Number 7 3.1.7 EINECS reference .7 3.2 Commercial form .7 3.3 Physical properties 7 3.3.1 Appearance and odour 7 3.3.2 Density 7 3.3.3 Solubility in water 7 3.3.4 Vapour pressure 7 3.3.5 Boilin
13、g point at 100 kPa .7 3.3.6 Melting point .7 3.3.7 Specific heat .7 3.3.8 Viscosity .8 3.3.9 Critical temperature .8 3.3.10 Critical pressure.8 3.3.11 Physical hardness .8 3.4 Chemical properties 8 4 Purity criteria 8 4.1 General 8 4.2 Composition of commercial product .8 4.3 Impurities and main by-
14、products .8 4.4 Chemical parameters 8 5 Test methods 9 5.1 Sampling .9 5.2 Analysis 9 5.2.1 Determination of available chlorine (main product) .9 5.2.2 Impurities . 11 5.2.3 Chemical parameters . 14 6 Labelling - Transportation - Storage . 16 6.1 Means of delivery 16 6.2 Labelling according to the E
15、U legislation . 17 6.3 Transportation regulations and labelling . 17 6.4 Marking 18 6.5 Storage . 18 6.5.1 General . 18 6.5.2 Long term stability 18 6.5.3 Storage incompatibilities . 18 BS EN 12932:2015EN 12932:2015 (E) 3 Annex A (informative) General information on sodium dichloroisocyanurate, dihy
16、drate. 19 A.1 Origin 19 A.1.1 Raw materials 19 A.1.2 Manufacturing process . 19 A.2 Use 19 A.2.1 Function 19 A.2.2 Form in which it is used 19 A.2.3 Treatment dose 19 A.2.4 Mean of application . 19 A.2.5 Secondary effects 20 A.2.6 Removal of excess product 20 Annex B (normative) General rules relati
17、ng to safety . 21 B.1 Rules for safe handling and use 21 B.2 Emergency procedures . 21 B.2.1 First aid . 21 B.2.2 Spillage . 21 B.2.3 Fire 22 Annex C (normative) Determination of arsenic, antimony and selenium (atomic absorption spectrometry hydride technique) 23 C.1 General principle . 23 C.2 Inter
18、ferences 23 C.3 Reagents. 23 C.4 Apparatus . 25 C.5 Procedure . 26 C.5.1 Preparation of the apparatus . 26 C.5.2 Preparation of calibration solutions 27 C.5.3 Preparation of test solutions and standard solutions . 27 C.5.4 Determination of arsenic with sodium borohydride 27 C.5.5 Determination of se
19、lenium with sodium borohydride . 27 C.5.6 Determination of antimony with sodium borohydride . 28 C.6 Calculation . 28 Bibliography 29 BS EN 12932:2015EN 12932:2015 (E) 4 Foreword This document (EN 12932:2015) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of whic
20、h 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 September 2015, and conflicting national standards shall be withdrawn at the latest by September 2015. This document supersedes
21、EN 12932:2008. 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. Significant technical difference between this edition and EN 12932:2008
22、 is as follows: a) deletion of reference to EU Directive 67/548/EEC of June 27, 1967 in order to take into account the latest Regulation in force (see 2); b) 6.2 updating of risk and safety labelling according to EU Regulation 2 and its latest Adaptations to Technical Progress). According to the CEN
23、-CENELEC Internal Regulations, the national standards organizations 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, Hungar
24、y, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12932:2015EN 12932:2015 (E) 5 Introduction In respect of potential adverse effects on the quality of
25、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 without restriction in any of the Member States of the EU or EFTA; b) it should be noted that, while awaiting the ado
26、ption 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 Standard does not confer or imply acceptance or approval of the product in any of the Member States of the EU or EFTA
27、. The use of the product covered by this European Standard is subject to regulation or control by National Authorities. BS EN 12932:2015EN 12932:2015 (E) 6 1 Scope This European Standard is applicable to sodium dichloroisocyanurate dihydrate used for emergency treatment of water intended for human c
28、onsumption. It describes the characteristics of sodium dichloroisocyanurate dihydrate and specifies the requirements and the corresponding test methods for sodium dichloroisocyanurate dihydrate. It gives information on its use in water treatment. It also determines the rules relating to safe handlin
29、g and use of sodium dichloroisocyanurate dihydrate (see Annex B). 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,
30、the latest edition of the referenced document (including any amendments) applies. EN 1233, Water quality - Determination of chromium - Atomic absorption spectrometric methods EN ISO 12846, Water quality - Determination of mercury - Method using atomic absorption spectrometry (AAS) with and without e
31、nrichment (ISO 12846) EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696) ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 8213, Chemical products for industri
32、al use Sampling techniques Solid chemical products in the form of particles varying from powders to coarse lumps ISO 8288:1986, Water quality Determination of cobalt, nickel, copper, zinc, cadmium and lead Flame atomic absorption spectrometric methods 3 Description 3.1 Identification 3.1.1 Chemical
33、name 1-sodium, 3, 5-dichloro-1,3,5-triazine-2, 4, 6-trione dihydrate. 3.1.2 Synonym or common name Sodium dichloroisocyanurate, dihydrate. Troclosene sodium, dihydrate 3.1.3 Relative molecular mass 256,02 3.1.4 Empirical formula C3N3O3Cl2Na.2H2O BS EN 12932:2015EN 12932:2015 (E) 7 3.1.5 Chemical for
34、mula 3.1.6 CAS Registry Number 1)51580-86-0 3.1.7 EINECS reference 2)Not listed. 3.2 Commercial form The product is available in various granular forms. 3.3 Physical properties 3.3.1 Appearance and odour The product is a white granular solid with chlorinous odour. 3.3.2 Density The bulk density of t
35、he product is approximately 0,9 g/cm3. 3.3.3 Solubility in water The solubility of the product in water is 291 g/l at 25 C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa 3)Not applicable, the product decomposes before fusion. 3.3.6 Melting point Not applicable. 3.3.7 Specific
36、heat (1,090 0,040) kJ/kg.K at 20 C. 1)Chemical Abstracts Service Registry Number. 2)European Inventory of Existing Commercial Chemical Substances. 3)100 kPa = 1 bar. BS EN 12932:2015EN 12932:2015 (E) 8 3.3.8 Viscosity Not applicable. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressur
37、e Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties The product is a strong oxidant. It liberates chlorine by hydrolysis. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for dihydrate sodium dichloroisocyanurate used for t
38、he 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 may be present and, if so, this shall be notified to the user and when necessary to the relevant authori
39、ties. 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 raw water quality, required dosage, contents of other impurities and additives used in the product not
40、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 raw materials. If the production process or raw materials lead to significant quantities of impurities
41、, by-products or additives being present, this shall be notified to the user. 4.2 Composition of commercial product The product shall contain at least a mass fraction of 55 % of available chlorine as calculated in accordance with the corresponding method given in 5.2.1. 4.3 Impurities and main by-pr
42、oducts The water content shall be less than a mass fraction of 14 % of the product. The sodium chloride content shall be less than a mass fraction of 0,05 % of the product. 4.4 Chemical parameters The product shall conform to the requirements specified in Table 1. BS EN 12932:2015EN 12932:2015 (E) 9
43、 Table 1 Chemical parameters Element Limit mg/kg of product Type 1 Type 2 Arsenic (As) max. 10 10 Cadmium (Cd) max. 1 1 Chromium (Cr) max. 6 10 Mercury (Hg) max. 0,02 0,02 Nickel (Ni) max. 3 3 Lead (Pb) max. 4 4 Antimony (Sb) max. 5 5 Selenium (Se) max. 1 1 NOTE Cyanide, which does not exist in a st
44、rong oxidizing medium such as sodium dichloroisocyanurate, dihydrate, is not a relevant chemical parameter. Pesticides and polycyclic aromatic hydrocarbons are not by-products of the manufacturing process. For parametric values of sodium dichloroisocyanurate on trace metal content in drinking water,
45、 see 1. 5 Test methods 5.1 Sampling Observe the general recommendations of ISO 3165 and take account of ISO 6206. Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. 5.2 Analysis 5.2.1 Determination of available chlorine (main product) 5.2.1.1 Principle The ava
46、ilable chlorine is determined by measuring active chlorine in the sample. The oxidizing chlorine reacts with potassium iodide releasing iodine which is then titrated with sodium thiosulfate standard volumetric solution in the presence of starch indicator solution. 5.2.1.2 Reagents All reagents shall
47、 be of a recognized analytical grade and the water used shall conform to grade 3 in accordance with EN ISO 3696. 5.2.1.2.1 Potassium iodide crystals (KI). 5.2.1.2.2 Glacial acetic acid. 5.2.1.2.3 Sodium thiosulfate standard volumetric solution, c(Na2S2O3.5H2O) = 0,1 mol/l. Standard volumetric soluti
48、ons of sodium thiosulfate are commercially available. Alternatively a standard volumetric solution may be prepared by the following procedure: Dissolve 24,8 g Na2S2O3.5 H2O in a 1 000 ml one-mark volumetric flask in about 0,75 l water. After the temperature has equalized make up to the mark with wat
49、er and mix thoroughly. BS EN 12932:2015EN 12932:2015 (E) 10 To standardize: Weigh, to the nearest 0,1 mg, 3,600 g (m) of dry potassium iodate. Dissolve in water in a 1 000 ml one-mark volumetric flask, make up to the mark with water and mix (standard reference solution c(1/6 KIO3) = 0,1 mol/l). Place 200 ml of water in a 500 ml stoppered conical flask, add (2 0,5) g of potassium iodide and stir to dissolve. Then introduce,by means of a pipette, 10,0 ml of sodium thiosulfate solution for standardization, add (15 1) ml of hydrochloric acid
