EN 12931:2008

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 sili - Natrijev dikloroizociaourat, brez vodeProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Produkte für den Notfall - Natriumdichlorisocyanurat, wasserfreiProduits chimiques pour le traitement de l'eau destinée à la consommation humaine - Produits chimiques utilisés en cas d'urgence - Dichloroisocyanurate de sodium, anhydreChemicals used for treatment of water intended for human consumption - Chemicals for emergency use - Sodium dichloroisocyanurate, anhydrous71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12931:2008SIST EN 12931:2008en,fr,de01-november-2008SIST EN 12931:2008SLOVENSKI
STANDARDSIST EN 12931:20001DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12931July 2008ICS 71.100.80Supersedes EN 12931:2000
English VersionChemicals used for treatment of water intended for humanconsumption - Chemicals for emergency use - Sodiumdichloroisocyanurate, anhydrousProduits chimiques pour le traitement de l'eau destinée à laconsommation humaine - Produits chimiques utilisés encas d'urgence - Dichloroisocyanurate de sodium, anhydreProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - Produkte für den Notfall -Natriumdichlorisocyanurat, wasserfreiThis European Standard was approved by CEN on 28 June 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12931:2008: ESIST EN 12931:2008

General information on sodium dichloroisocyanurate, anhydrous.19 Annex B (normative)
General rules relating to safety.21 Annex C (normative)
Determination of arsenic, antimony and selenium (atomic absorption spectrometry hydride technique).23 Bibliography.30
 Deletion of reference to EU Directive 80/778/EEC of July 15, 1980 in order to take into account the latest Directive in force (see [1]). Other amendments a) section 3.1.2 – inclusion of “Troclosene sodium” as a synonym; b) section 3.1.7 – corrected typo for EINECS reference {“220-767-7” instead of “2-207-67-7”}; c) section 5.2.3.2.2 – corrected typo {“dichromate” instead of “dichrormate”}; d) section 6.1 – inclusion of big bags as permitted means of delivery; e) section 6.2 – updating of risk and safety labelling according to EU directives (Annex I of the Directive 67/548EEC and its latest Adaptations to Technical Progress): 1) addition of N: Dangerous for the environment; 2) addition of R phrase:  R 50/53: Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 3) addition of S phrases:  S2: Keep out of the reach of children.  S 60: This material and its container must be disposed of as hazardous waste.  S 61: Avoid release to the environment. Refer to special instructions/safety data sheets. f) section 6.4 – addition of “Troclosene sodium” as one possible chemical name. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, SIST EN 12931:2008

1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. SIST EN 12931:2008

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 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, by-products or additives being present, this shall be notified to the user.
3) 100 kPa = 1 bar SIST EN 12931:2008

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 Lead (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 sodium dichloroisocyanurate, 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, 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. SIST EN 12931:2008

Alternatively a standard volumetric solution can 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 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 1000 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 m
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