SIST EN 12932:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Kemikalije za uporabo v izrednih razmerah - Natrijev dikloroizocianurat, dehidriranrodukte zur Aufbereitung von Wasser für den menschlichen Gebrauch — Produkte für den Notfall — Natriumdichlorisocyanurat-dihydratProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Produits chimiques utilisés en cas d'urgence - Dichloroisocyanurate de sodium dihydratéChemicals used for treatment of water intended for human consumption - Chemicals for emergency use - Sodium dichloroisocyanurate, dihydrate71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12932:2015SIST EN 12932:2015en,fr,de01-junij-2015SIST EN 12932:2015SLOVENSKI
STANDARDSIST EN 12932:20081DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12932
March 2015 ICS 71.100.80 Supersedes EN 12932:2008English Version
Chemicals used for treatment of water intended for human consumption - Chemicals for emergency use - Sodium dichloroisocyanurate, dihydrate
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Produits chimiques utilisés en cas d'urgence - Dichloroisocyanurate de sodium dihydraté
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Produkte für 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 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions.
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, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12932:2015 ESIST EN 12932:2015

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 .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 Boiling 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-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 EU 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 SIST EN 12932:2015

General information on sodium dichloroisocyanurate, dihydrate. 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 relating 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 Interferences . 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 selenium with sodium borohydride . 27 C.5.6 Determination of antimony with sodium borohydride . 28 C.6 Calculation . 28 Bibliography . 29
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 the 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 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. SIST EN 12932:2015

(1) where c1 is the concentration, expressed in moles per litre, of the potassium iodate standard reference solution [c(1/6 KIO3) = 0,1 mol/l]; V is the volume, in millilitres, of the sodium thiosulfate standard volumetric solution used for the standardization (V = 10 ml); V1 is the volume, in millilitres, of potassium iodate standard reference solution used in the titration. 5.2.1.2.4 Starch solution, mass fraction1 % . Make a slurry with (1 ± 0,1) g starch and (5 ± 1) ml water. Add (90 ± 5) ml boiling water to the slurry. Stir to dissolve it and cool the solution. This solution needs refrigeration to avoid the decomposition of the starch which results in a vague end point. Keep the solution cool and use it within one week. NOTE Commercial indicators for iodine titration exist and may be used in place of the specified starch solution provided that their efficiency has been previously tested. 5.2.1.3 Apparatus Ordinary laboratory apparatus and glassware. 5.2.1.4 Procedure 5.2.1.4.1 Test portion Weigh, to the nearest 0,1 mg, 0,25 g of the laboratory sample (m0) into a tared stoppered weighing bottle. 5.2.1.4.2 Determination Transfer the test portion to a 200 ml volumetric flask. Add 10 ml of water and 10 ml of glacial acetic acid (5.2.1.2.2), stir for 5 min and then add 100 ml of water and 2 g of potassium iodide (5.2.1.2.1), and mix to dissolve and wait 10 min. Titrate with the sodium thiosulfate standard volumetric solution (5.2.1.2.3) to a light yellow colour. Add 5 ml of the starch solution (5.2.1.2.4) and continue titration to the disappearance of the blue black colour. Record the volume (V1) of the sodium thiosulfate standard volumetric solution used. SIST EN 12932:2015
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