SIST EN 12933:2015

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 - Trikloroizocianova kislinaProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Produkte für den Notfall - TrichlorisocyanursäureProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Produits chimiques utilisés en cas d'urgence - Acide trichloroisocyanuriqueChemicals used for treatment of water intended for human consumption - Chemicals for emergency use - Trichloroisocyanuric acid71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12933:2015SIST EN 12933:2015en,fr,de01-junij-2015SIST EN 12933:2015SLOVENSKI
STANDARDSIST EN 12933:20081DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12933
March 2015 ICS 71.100.80 Supersedes EN 12933:2008English Version
Chemicals used for treatment of water intended for human consumption - Chemicals for emergency use - Trichloroisocyanuric acid
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Produits chimiques utilisés en cas d'urgence - Acide trichloroisocyanurique
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Produkte für den Notfall - Trichlorisocyanursäure 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.
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..........................................................................................................................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 ...........................................................................................................................................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 parameters ............................................................................................................................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 Transportation 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 SIST EN 12933:2015

General information on trichloroisocyanuric acid . 20 A.1 Origin . 20 A.1.1 Raw materials . 20 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 handling 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 . 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 Determination of antimony with sodium borohydride . 29 C.6 Calculation . 29 Bibliography . 30
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 forms: 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/cm3 for powder and granules; − 1,9 g/cm3 for tablets. 3.3.3 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 Chemical Substances. 3) 100 kPa = 1 bar SIST EN 12933:2015

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 trichloroisocyanuric acid, is not a relevant chemical parameter. Pesticides and polycyclic aromatic hydrocarbons are not by-products of the manufacturing process. For 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 Analysis 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 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. SIST EN 12933:2015

is the volume, in millilitres, of potassium iodate standard reference solution used in the titration. 5.2.1.2.4 Starch solution, mass fraction 1 %. 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 SIST EN 12933:2015

is the volume, in millilitres, of the sodium thiosulfate standard volumetric solution (5.2.1.2.3) used for the titration; m0 is the mass, in grams, of the test portion (5.2.1.4.1); 0,003545 is the mass, in grams, of chlorine (Cl2) corresponding to 1,00 ml of sodium thiosulfate solution, c(Na2S2O3.5H2O) = 0,1 mol/l; c is the actual concentration expressed in moles per litre, of the sodium thiosulfate standard volumetric solution (5.2.1.2.3).
5.2.1.6 Accuracy The result is accurate to within ± 0,1 %. 5.2.2 Impurities 5.2.2.1 Water 5.2.2.1.1 Principle The water content in trichloroisocyanuric acid is determined by the mass loss after heating in an oven. The temperature is set at a low level because trichloroisocyanuric acid can lose chlorine on heating. 5.2.2.1.2 Apparatus Oven made of aluminium, provided with a means of circulating the air inside. 5.2.2.1.3 Procedure Weigh 10 g of the laboratory sample (m1) to the nearest 0,001 g, in a glass evaporating dish (diameter 150 mm). SIST EN 12933:2015

Weigh 2,542 1 g of sodium chloride that has been previously dried for 1 h at 110 °C. Dissolve with water and make up to the mark with water in a 1 000 ml one-mark volumetric flask. Mix well. 5.2.2.2.4 Apparatus Ordinary laboratory apparatus and glassware, together with the followi
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