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



SIST EN 12933:2015



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.
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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR 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 worldwide for CEN national Members. Ref. No. EN 12933:2015 ESIST EN 12933:2015



EN 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 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 ...........................................................................................................................................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



EN 12933:2015 (E) 3 Annex A (informative)
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
SIST EN 12933:2015



EN 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 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 EN 12933:2008. 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 12933:2008 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-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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 12933:2015



EN 12933:2015 (E) 5 Introduction In respect of potential adverse effects on the quality of 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 adoption 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. The use of the product covered by this European Standard is subject to regulation or control by National Authorities. SIST EN 12933:2015



EN 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 trichloroisocyanuric 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 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, 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 enrichment (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 industrial 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 name 1,3,5-trichloro - 1,3,5 triazine - 2,4,6-trione. 3.1.2 Synonym or common names Trichloroisocyanuric acid, TCCA. Symclosene. 3.1.3 Relative molecular mass 232,42. 3.1.4 Empirical formula C3N3O3Cl3. SIST EN 12933:2015



EN 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 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



EN 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 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 This 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 may 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 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. 4.2 Composition of commercial product The commercial product shall contain at least a mass fraction of 89 % of available chlorine 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. SIST EN 12933:2015



EN 12933:2015 (E) 9 The sodium chloride content shall be less than a mass fraction of 0,05 % 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 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



EN 12933:2015 (E) 10 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 solutions of sodium thiosulfate are commercially available; eventually they have to be diluted. Alternatively a standard volumetric solution may be prepared by the following procedure: 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 introduce, by means of a pipette, 10,0 ml of sodium thiosulfate solution for standardization, add (15 ± 1) ml of hydrochloric acid solution (diluted 1 + 1 by volume) and (5 ± 1) ml of starch solution (5.2.1.2.4). Titrate immediately with the potassium iodate standard reference solution until the appearance of a blue coloration persisting for at least 30 s occurs. Record the volume (V1) of iodate used. The actual concentration, c, of the sodium thiosulfate standard volumetric solution (Na2S2O3.5H2O), expressed in moles per litre is given by the following formula: VcVc11×= (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 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



EN 12933:2015 (E) 11 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. 5.2.1.5 Expression of results The available chlorine (Cl2) content, C1, expressed as a mass fraction in %, is given by the following formula: 100003545,0011×××=mcVC (2) where V1
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



EN 12933:2015 (E) 12 Put it in the ventilated oven at 105 °C for 4 h. Allow to cool in a desiccator and weigh again. 5.2.2.1.4 Expression of results The water content (w), expressed as a mass fraction in % is given by the following formula: 100121×−=mmmw (3) where m1 is the mass, in grams, before drying; m2 is the mass, in grams, after drying. 5.2.2.2 Sodium chloride 5.2.2.2.1 General This method applies to products with sodium chloride contents in the range of mass fraction from 0 % to 0,05 %. 5.2.2.2.2 Principle The trichloroisocyanuric acid is acidified and then digested to remove all traces of available chlorine. Sodium is analysed in solution by atomic absorption spectrometry. 5.2.2.2.3 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. 5.2.2.2.3.1 Sulfuric acid concentrated (H2SO4), mass fraction 95 % minimum. 5.2.2.2.3.2 Sodium standard stock solution, c (Na) = 1 000
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 following: 5.2.2.2.4.1 Atomic absorption spectrometer equipped with sodium hollow cathode lamp. 5.2.2.2.4.2 Hot plates. 5.2.2.2.5 Procedure 5.2.2.2.5.1 Test portion Weigh, to the nearest 0,1 mg, 2,5 g of the laboratory sample (m3) into a tared stoppered weighing bottle. SIST EN 12933:2015



EN 12933:2015 (E) 13 5.2.2.2.5.2 Determination Transfer the test portion to a 250 ml beaker. Dilute with 25 ml of water. Mix and then add 10 ml of the concentrated sulfuric acid (5.2.2.2.3.1) and place on a hot plate (5.2.2.2.4.2) and boil until the salt begins to precipitate. Rinse the inside of the beaker with water. Transfer to a 250 ml volumetric flask and make up to the mark with water and mix well. Measure the
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