1、BSI Standards PublicationBS EN 12933:2015Chemicals used for treatmentof water intended for humanconsumption Chemicalsfor emergency use Trichloroisocyanuric acidBS EN 12933:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12933:2015. It supersedes BS EN 12933
2、:2008 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment.A list of organizations represented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
3、necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 86480 3ICS 13.060.20; 71.100.80Compliance with a British Standard cannot confer immunity from legal obligations.This Bri
4、tish Standard was published under the authority of the Standards 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 12933:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12933 March 2015 ICS 71.100.80 Supersedes EN
5、12933:2008English Version Chemicals used for treatment of water intended for human consumption - Chemicals for emergency use - Trichloroisocyanuric acid Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Produits chimiques utiliss en cas durgence - Acide trichlor
6、oisocyanurique Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Produkte fr den Notfall - Trichlorisocyanursure This European Standard was approved by CEN on 20 December 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
7、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 member. This European Standard exists in th
8、ree 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. CEN members are the national standards b
9、odies 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, Poland, Portugal, Romania, Slovakia, Slovenia,
10、 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 in any form and by any means reserved worl
11、dwide for CEN national Members. Ref. No. EN 12933:2015 EBS EN 12933:2015EN 12933:2015 (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 names 6 3.1.3 Relative molecular mass .6 3.1.4
12、 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 Boiling point at 100 kPa .7 3.3.6 Melting point
13、 .8 3.3.7 Specific heat .8 3.3.8 Viscosity (dynamic) .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-products .8 4.4 Chemical parame
14、ters 9 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 EU legislation . 17 6.3 Transpor
15、tation regulations and labelling . 18 6.4 Marking 18 6.5 Storage . 19 6.5.1 General . 19 6.5.2 Long term stability 19 6.5.3 Storage incompatibilities . 19 BS EN 12933:2015EN 12933:2015 (E) 3 Annex A (informative) General information on trichloroisocyanuric acid 20 A.1 Origin 20 A.1.1 Raw materials 2
16、0 A.1.2 Manufacturing process . 20 A.2 Use 20 A.2.1 Function . 20 A.2.2 Form in which it is used 20 A.2.3 Treatment dose 20 A.2.4 Means of application . 20 A.2.5 Secondary effects 20 A.2.6 Removal of excess product 21 Annex B (normative) General rules relating to safety . 22 B.1 Rules for safe handl
17、ing and use 22 B.2 Emergency procedures. 22 B.2.1 First aid . 22 B.2.2 Spillage . 22 B.2.3 Fire 23 Annex C (normative) Determination of arsenic, antimony and selenium (atomic absorption spectrometry hydride technique) 24 C.1 General principle . 24 C.2 Interferences 24 C.3 Reagents 24 C.4 Apparatus .
18、 26 C.5 Procedure . 27 C.5.1 Preparation of the apparatus . 27 C.5.2 Preparation of calibration solutions 28 C.5.3 Preparation of test solutions and standard solutions . 28 C.5.4 Determination of arsenic with sodium borohydride 28 C.5.5 Determination of selenium with sodium borohydride . 28 C.5.6 De
19、termination of antimony with sodium borohydride . 29 C.6 Calculation . 29 Bibliography 30 BS EN 12933:2015EN 12933:2015 (E) 4 Foreword This document (EN 12933:2015) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard s
20、hall 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 EN 12933:2008. Attention is drawn to the pos
21、sibility 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 12933:2008 is as follows: a) deletion of reference to
22、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-CENELEC Internal Regulations, the national s
23、tandards 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania
24、, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12933:2015EN 12933:2015 (E) 5 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused
25、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 adoption of verifiable European criteria, existi
26、ng 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. The use of the product covered by this Euro
27、pean Standard is subject to regulation or control by National Authorities. BS EN 12933:2015EN 12933:2015 (E) 6 1 Scope This European Standard is applicable to trichloroisocyanuric acid used for emergency treatment of water intended for human consumption. It describes the characteristics of trichloro
28、isocyanuric acid and specifies the requirements and the corresponding test methods for trichloroisocyanuric acid. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use of trichloroisocyanuric acid (see Annex B). 2 Normative references The
29、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 edition of the referenced document (including any amendments) applies. EN 1233, Wa
30、ter 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 enrichment (ISO 12846) EN ISO 3696, Water for analytical laboratory use - Specification and te
31、st 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 industrial use Sampling techniques Solid chemical products in the form of particles varying from powd
32、ers 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 name 1,3,5-trichloro - 1,3,5 triazine - 2,4,6-trione. 3.1.2 Synonym or common names Trichloro
33、isocyanuric acid, TCCA. Symclosene. 3.1.3 Relative molecular mass 232,42. 3.1.4 Empirical formula C3N3O3Cl3. BS EN 12933:2015EN 12933:2015 (E) 7 3.1.5 Chemical formula 3.1.6 CAS Registry Number 1)87-90-01. 3.1.7 EINECS reference 2)201-782-8. 3.2 Commercial form The product is available in various fo
34、rms: powder, granules or tablets. 3.3 Physical properties 3.3.1 Appearance and odour The product is white free-flowing powder, granules or tablets with chlorinous odour. 3.3.2 Density The bulk density of the product is approximately: 1 g/cm3; 1,2 g/cm3for powder and granules; 1,9 g/cm3for tablets. 3
35、.3.3 Solubility in water The solubility of the product in water is 12 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. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial
36、Chemical Substances. 3) 100 kPa = 1 bar BS EN 12933:2015EN 12933:2015 (E) 8 3.3.6 Melting point Not applicable. 3.3.7 Specific heat (880 40) kJ/kg.K at 20 C. 3.3.8 Viscosity (dynamic) Not applicable. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical
37、hardness Not applicable. 3.4 Chemical properties The product is a strong oxidant, it is corrosive and hygroscopic; trichloroisocyanuric acid decomposes into hydrochloric acid and cyanuric acid. When dissolved in an excess of water it liberates chlorine by hydrolysis. 4 Purity criteria 4.1 General Th
38、is European Standard specifies the minimum purity requirements for trichloroisocyanuric acid 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
39、ay be present and, if so, this shall be notified to the user and when necessary to relevant authorities. 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
40、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 raw
41、 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 commercial product shall contain at least a mass fraction of 89 % of available ch
42、lorine as calculated in accordance with the corresponding method given in 5.2.1. 4.3 Impurities and main by-products The water content shall be less than a mass fraction of 0,15 % of product. BS EN 12933:2015EN 12933:2015 (E) 9 The sodium chloride content shall be less than a mass fraction of 0,05 %
43、 of product. 4.4 Chemical parameters The product shall conform to the requirements specified in Table 1. 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 5 Lea
44、d (Pb) max. 4 15 Antimony (Sb) max. 5 5 Selenium (Se) max. 1 1 NOTE Cyanide, which does not exist in a strong oxidizing medium such as trichloroisocyanuric acid, is not a relevant chemical parameter. Pesticides and polycyclic aromatic hydrocarbons are not by-products of the manufacturing process. Fo
45、r parametric values of trichloroisocyanuric acid on trace metal content in drinking water, 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 A
46、nalysis 5.2.1 Determination of available chlorine (main product) 5.2.1.1 Principle The available 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
47、solution in the presence of starch indicator solution. 5.2.1.2 Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to grade 3 in accordance with EN ISO 3696. BS EN 12933:2015EN 12933:2015 (E) 10 5.2.1.2.1 Potassium iodide crystals (KI). 5.2.1.2.2 Glacial
48、acetic acid. 5.2.1.2.3 Sodium thiosulfate standard volumetric solution, c(Na2S2O3.5H2O) = 0,1 mol/l. Standard volumetric solutions of sodium thiosulfate are commercially available; eventually they have to be diluted. Alternatively a standard volumetric solution may be prepared by the following proce
49、dure: Dissolve 24,8 g Na2S2O3.5H2O 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 water and mix thoroughly. 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(1/6KIO3) = 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
