SIST EN 12933:2008

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 - Trikloroisocianova kislinaProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Produkte für den Notfall - TrichlorisocyanursäureProduits chimiques 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 12933:2008SIST EN 12933:2008en,fr,de01-november-2008SIST EN 12933:2008SLOVENSKI
STANDARDSIST EN 12933:20011DGRPHãþD



SIST EN 12933:2008



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12933July 2008ICS 71.100.80Supersedes EN 12933:2000
English VersionChemicals used for treatment of water intended for humanconsumption - Chemicals for emergency use -Trichloroisocyanuric acidProduits chimiques pour le traitement de l'eau destinée à laconsommation humaine - Produits chimiques utilisés encas d'urgence - Acide trichloroisocyanuriqueProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - Produkte für den Notfall -TrichlorisocyanursäureThis 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 12933:2008: ESIST EN 12933:2008



EN 12933:2008 (E) 2 Contents Page Foreword.3 Introduction.5 1 Scope.6 2 Normative references.6 3 Description.6 4 Purity criteria.8 5 Test methods.9 6 Labelling - Transportation - Storage.16 Annex A (informative)
General information on trichloroisocyanuric acid.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
SIST EN 12933:2008



EN 12933:2008 (E) 3 Foreword This document (EN 12933:2008) 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 January 2009, and conflicting national standards shall be withdrawn at the latest by January 2009. 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. This document supersedes EN 12933:2000. Significant technical difference between this edition and EN 12933:2000 is as follows:
 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 – addition of “Symclosene” as a synonym; b) section 6.1 – inclusion of big bags as permitted means of delivery; c) 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) inclusion of “N : Dangerous for the environment”; 2) deletion of
R phrase:  R 34: Causes burns. 3) addition of R phrase
 R 50/53: Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 4) 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. d) section 6.4 – addition of
“Symclosene” 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, SIST EN 12933:2008



EN 12933:2008 (E) 4 Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
SIST EN 12933:2008



EN 12933:2008 (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 12933:2008



EN 12933:2008 (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 referenced documents are indispensable for the application of this document. 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 1483, Water quality - Determination of mercury – Method using atomic absorption spectrometry EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987) 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 12933:2008



EN 12933:2008 (E) 7 3.1.5 Chemical formula NC = ON - CICOO = CCI - NCl
3.1.6 CAS Registry Number1) 87-90-01 3.1.7 EINECS reference2) 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.
1) Chemical Abstracts Service Registry Number 2) European Inventory of Existing Commercial Chemical Substances SIST EN 12933:2008



EN 12933:2008 (E) 8 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3) Not applicable, the product decomposes before fusion. 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. NOTE
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.
3) 100 kPa = 1 bar SIST EN 12933:2008



EN 12933:2008 (E) 9 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. 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. SIST EN 12933:2008



EN 12933:2008 (E) 10 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. 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 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
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 potassiumiodide and stir to dissolve. Then introduce, by means of a pipette, 10,0 ml of sodium thiosulfate solution forstandardization, 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 equation:
VcV11c×=
(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. SIST EN 12933:2008



EN 12933:2008 (E) 11 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 can be used in place of the specified starch solution provided that their efficiency has been previously tested. 5.2.1.3 Apparatus 5.2.1.3.1 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. 5.2.1.5 Expression of results The available chlorine (Cl2) content, C1, expressed as a mass fraction in %, is given by the following equation: 1000003545,011×××=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 %. SIST EN 12933:2008



EN 12933:2008 (E) 12 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 5.2.2.1.2.1 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 0,001g, in a glass evaporating dish (diameter 150 mm). 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 equation: 100121x−=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 µg/ml. SIST EN 12933:2008



EN 12933:2008 (E) 13 Weigh 2,542 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. 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 absorbance of the solution on the atomic absorption spectrometer (5.2.2.2.4.1) with sodium hollow cathode lamp at a wavelength of 330,2 nm with slit setting at "4" using an air-acetylene flame. 5.2.2.2.5.3 Calibration Transfer accurately from the sodium standard solutions (5.2.2.2.3.2) 1,0 ml, 2,0 ml, 3,0 ml, 4,0 ml, 5,0 ml, and 10,0 ml portions to a series of 100 ml volumetric flasks, make up each to the mark with water and mix well. Prepare a calibration blank. Measure the absorbance of each calibration solution as described in 5.2.2.2.5.2, and prepare a calibration graph. 5.2.2.2.6 Expression of results The sodium chloride content, (C2), expressed as a mass fraction in % of product is given by the following equation: 00010542122010032××××=mcC, (4) where m3 is the mass, in grams, of the test portion; c is the concentration, in micrograms per millilitre, of sodium in the test portion as determined from the calibration graph. SIST EN 12933:2008



EN 12933:2008 (E) 14 5.2.2.2.7 Repeatability limit The absolute difference between two single test results, obtained under repeatability conditions, shall not be greater than the repeatability value, r, as calculated from the following equation: r = 0,025 z
(5) where
z
is the mean of the two results, expressed in mass fraction in % . NOTE 1 A 98,3 % to 100,7 % recovery was obtained at Na content of a mass fraction of 20 %. NOTE 2 Repeatability conditions are conditions where mutually independent test results are obtained with the same method on identical test material in the same laboratory by the same operator using the same equipment within short intervals of time. 5.2.3 Chemical parameters 5.2.3.1 Determination of antimony (Sb), arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), nickel (Ni) and selenium (Se) 5.2.3.1.1 Principle The elements arsenic, antimony, cadmium, chromium, lead, nickel and selenium are determined by atomic absorption spectrometry. 5.2.3.1.2
Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to the grade 3 specified in EN ISO 3696. 5.2.3.1.2.1 Nitric acid, concentrated, density ρ = 1,42 g/ml. 5.2.3.1.3 Procedure 5.2.3.1.3.1 Test portion Weigh, to the nearest 0,01 g, 20 g (m4) of the laboratory sample into a 100 ml one mark volumetric flask. 5.2.3.1.3.2 Test solution Add 1 ml of nitric acid (5.2.3.1.2) to the test portion, dilute with a few millilitres of water and mix. Make up to the mark with water and homogenize. 5.2.3.1.3.3 Determination Determine the content of chemical parameters in the test solution (5.2.3.1.3.2) in accordance with the following methods:  Cd, Ni and Pb : In accordance with ISO 8288:1986, Method A;  Cr : In accordance with EN 1233;  As, Se and Sb : In accordance with the method given in Annex C; SIST EN 12933:2008



EN 12933:2008 (E) 15 These methods provide an interim result (y) expressed in milligrams per litre which needs to be converted to give the final concentration according to the equation (6) in 5.2.3.1.4. 5.2.3.1.4 Expression of results From the interim result (y) determined (see 5.2.3.1.3.3), the content, C3 of each chemical parameter in the laboratory sample expressed in milligrams per kilogram of product is given by the following equation: 143100CmVyC××= (6) where y is the interim result (5.2.3.1.3.3); V is the volume, expressed in millilitres, of the test solution (5.2.3.1.3.2) (= 100 ml); m4
is the mass, expressed in grams, of the test portion; C1 is the available chlorine content in mass fraction of product (see 5.2.1.5). 5.2.3.2 Determination of the mercury content (Hg) 5.2.3.2.1 Principle The element mercury is determined by flameless atomic absorption spectrometry in accordance with EN 1483. 5.2.3.2.2 Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to the grade 3 specified in EN ISO 3696. 5.2.3.2.2.1 Potassium permanganate solution, c(KMnO4) = 50 g/l. 5.2.3.2.2.2 Sulfuric acid, concentrated, density p = 1,84 g/ml. 5.2.3.2.2.3 Hydroxylammonium chloride, solution c(NH2OH.HCl) = 100 g/l. 5.2.3.2.2.4 Potassium dichromate solution, c(K2Cr2O7) = 4 g/l in volume fraction 50 %
nitric acid solution. 5.2.3.2.3 Procedure 5.2.3.2.3.1 Test portion Weigh, to the nearest of 0,01 g, 10 g (m5) of the laboratory sample into a glass beaker. 5.2.3.2.3.2 Test solution Quantitatively transfer the test portion to a 100 ml (V1) volumetric flask. Make up to the mark with water (solution A). Pipette 10 ml of the solution A. Transfer into a 250 ml conical flask, add 60 ml of water, 20 ml of a potassium permanganate solution (5.2.3.2.2.1) and five 1 ml portions of sulfuric acid (5.2.3.2.2.2). Bring to the boil and SIST EN 12933:2008



EN 12933:2008 (E) 16 maintain boiling for 10 min. Allow to cool. Just dissolve the precipitate (MnO2) with hydroxylammonium chloride (5.2.3.2.2.3), add 5 ml of the potassium dichromate solution (5.2.3.2.2.4) and transfer into a 100 ml (V2) volumetric flask. Make up to the mark with water and mix. 5.2.3.2.3.3 Determination Proceed as described in EN 1483. 5.2.3.2.4 Expression of results The interim result for mercury content (y) expressed in milligrams per litre is given by the following equation: 10y2AV×=y (7) where yA is the result obtained in 5.2.3.2.3.3, for the concentration of mercury in the test solution, expressed in milligrams per litre; V2 is the volume in millilitres of the test solution. The mercury content, C4, in milligrams per kilogram of product is given by the following equation: 1514100CmVyC×= (8) where y is the interim result for mercury content; m5 is the mass, expressed in grams, of the test portion; C1 is the available chlorine content in mass fraction (see 5.2.1.5); V1 is the volume in millilitres of the solution A (see 5.2.3.2.3.2). 6 Labelling - Transportation - Storage 6.1 Means of delivery The product shall be delivered in fibre or polyethylene drums, big bags or semi-bulk containers. In order that the purity of the product is not affected, the means of delivery shall not have been used previously for any different product or it shall have been specially cleaned and prepared before use. 6.2 Risk and safety labelling according to the EU directives4)
The following labelling requirements shall apply to trichloroisocyanuric acid at the date of publication of this European Standard.
4) See [2] SIST EN 12933:2008



EN 12933:2008 (E) 17 a) Symbols and indications of danger: 1) O : Oxidizing; 2) Xn : Harmful; 3) N : Dangerous for the environment. b) Nature of special risks attributed to dangerous substances: 1) R8 : Contact with combustible material may cause fire; 2) R22 : Harmful if swallowed; 3) R31 : Contact with acids liberates toxic gas; 4) R36/37 : Irritating to eyes and respiratory system; 5) R 50/53: Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. c) Safety advice concerning dangerous substances: 1) S2 : Keep out of the reach of children; 2) S8 : Keep container dry; 3) S26 : In case of contact with eyes, rinse immediately with plenty of water and seek medical advice; 4) S41 : In case of fire and/or explosion do not breathe fumes; 5) S 60: This material and its container must be disposed of as hazardous waste; 6) S 61: Avoid release to the environment. Refer to special instructions/safety data sheets. NOTE Annex I of the Directive 67/548/EEC on Classification, packaging and labelling of dangerous substances and its amendments and adaptations in the European Union contains a list of substances classified by the EU. Substances not in this Annex I should be classified on the basis of their intrinsic properties according to the criteria in the Directive by the person responsible for the marketing of the substance. 6.3 Transportation regulations and labelling Trichloroisocyanuric acid is listed as UN Number 5) 2468 and classified as dangerous good.  RID 6): class 5.1, classification code O2, packing group II;  ADR 7): class 5.1, classification code O2, packing group II;
5) United Nations Number 6) Regulations concerning International carriage of Dangerous goods by rail 7) European Agreement concerning the international carriage of Dangerous goods by Road SIST EN 12933:2008



EN 12933:2008 (E) 18  IMDG 8): class 5.1;  IATA 9) : class 5.1. 6.4 Marking The marking shall include the following:  the name "trichloroisocyanuric acid" or “Symclosene”, trade name, grade and type;  the net mass;  the name and the address of supplier and/or manufacturer;  the statement "This product conforms to EN 12933". 6.5 Storage The product shall be stored in original packages firmly closed in a cool dry place, away from any sources of heat or incompatible materials. 6.5.1 Long term stability When stored in above conditions, the product is stable for at least three years. 6.5.2 Storage incompatibilities Store preferably alone, keep away from:  water, moisture;  nitrogenated products;  organic solvents;  hydrocarbons;  peroxides;  hypochlorites;  oils, greases and organic materials.
8) International Maritime transport of Dangerous Goods 9) International Air Transport Association SIST EN 12933:2008



EN 12933:2008 (E) 19 Annex A
(informative)
General information on trichloroisocyanuric acid A.1 Origin A.1.1 Raw materials Trichloroisocyanuric acid is manufactured from isocyanuric acid (CNOH)3, sodium hydroxide (NaOH) and chlorine (Cl2). A.1.2 Manufacturing process Trichloroisocyanuric acid is produced by chlorination of trisodium cyanurate (Na3(NCO)3) using chlorine (Cl2). Trisodium cyanurate is o
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