SIST EN 15028:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Chemicals used for treatment of water intended for human consumption - Sodium chlorateProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - NatriumchloratProduits chimiques utilisés pour le traitement de l'eau destinée a la consommation humaine - Chlorate de sodiumChemicals used for treatment of water intended for human consumption - Sodium chlorate71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 15028:2006SIST EN 15028:2006en01-julij-2006SIST EN 15028:2006SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15028March 2006ICS 71.100.80 English VersionChemicals used for treatment of water intended for humanconsumption - Sodium chlorateProduits chimiques utilisés pour le traitement de l'eaudestinée à la consommation humaine - Chlorate de sodiumProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - NatriumchloratThis European Standard was approved by CEN on 3 February 2006.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, 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© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15028:2006: ESIST EN 15028:2006

General information on sodium chlorate.17 Annex B (normative)
General rules relating to safety.18 Annex C (informative)
Environmental, health and safety precautions within chemical laboratory.19 Bibliography.20
Table 1 — Density of sodium chlorate solution Concentration of aqueous solution of sodium chlorate solution (Mass fraction in %) Density (g/ml at 20 °C) 30 1,24 40 1,33 50 1,44 3.3.3 Solubility in water The solubility of sodium chlorate in water is given in Table 2. Table 2 — Solubility of sodium chlorate Temperature (°C) Solubility (g/l) 10 650 20 700 40 780 60 880
1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. SIST EN 15028:2006

(mass fraction in %) Crystallization point
(°C) 40 -20 45 0 50 20 55 32 60 55 3.3.7 Melting point The melting point (of the solid) is 248 °C; and the thermal decomposition is at ≥ 400 °C. 3.3.8 Viscosity (dynamic) The relative viscosity of aqueous solutions of mass fraction of 40 % of sodium chlorate compared with water at the same temperature between 25 °C and 35 °C is 2,07. 3.3.9 Critical temperature in aqueous solution Not applicable 3.3.10 Critical pressure Not applicable
3) 100 kPa = 1 bar. SIST EN 15028:2006

NOTE 1 When an acidic sodium chlorate solution is treated with a reducing agent (e.g. hydrogen peroxide (EN 902) or oxalic acid), chlorine dioxide can be formed. NOTE 2 The formation of chlorine dioxide can also be obtained by acidification only if the acid applied is capable of acting as a reducing agent in the current environment. For the purpose of drinking water treatment one should use acids of quality in accordance with existing standards for the purpose: hydrochloric acid (EN 939); sulfuric acid (EN 899); phosphoric acid (EN 974). NOTE 3 By itself, sodium chlorate can be used as an oxidant-algicide for temporary maintenance of water premises, the water being not directly distributed during the operations. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for sodium chlorate 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 be 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. 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 in 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 sodium chlorate is commercially available as solid forms usually with a minimum dry mass fraction of 99 % of NaClO3. Commercial solutions if used for water treatment shall be certified to be made-up on the basis of the product with a dry mass fraction of 99 %. No additional substances like colorants shall be added to the basic product or to the solutions. The content of sodium chlorate in commercially available solutions shall be within 3 % of the manufacturer's declared value. 4.3 Impurities and main by-products NOTE Sodium chlorate in crystalline form contains normally a maximum mass fraction of 0,1 % of sodium chloride (as NaCl). SIST EN 15028:2006

Table 5 – Chemical parameters Parameter
Limit in
sodium chlorate (mass fraction 100 %)
(mg/kg) Arsenic (As) max.
Cadmium (Cd) max.
Chromium (Cr) max.5
Mercury (Hg) max.1
Nickel (Ni) max.1
Lead (Pb) max.1
Antimony (Sb) max.1
Selenium (Se) max.1
NOTE Cyanide which does not exist in a strong oxidizing medium such as sodium chlorate is not a relevant chemical parameter. Pesticides and polycyclic aromatic hydrocarbons are not by-products of the manufacturing process. For parametric values of sodium chlorate on trace metal content in drinking water, see [1].
5 Test methods 5.1 Sampling 5.1.1 General Observe the recommendations of ISO 3165 and take account of ISO 6206. 5.1.2 Solid Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. 5.1.3 Liquid 5.1.3.1 Sampling from drums and bottles 5.1.3.1.1 General 5.1.2.1.1.1 Mix the contents of each container to be sampled by shaking the container, by rolling it or by rocking it from side to side, taking care not to damage the container or spill any of the liquid. 5.1.2.1.1.2 If the design of the container is such (for example, a narrow-necked bottle) that it is impracticable to use a sampling implement, take a sample by pouring after the contents have been thoroughly mixed. Otherwise, proceed as described in 5.1.3.1.1.3. 5.1.3.1.1.3 Examine the surface of the liquid. If there are signs of surface contamination, take samples from the surface as described in 5.1.3.1.2. Otherwise, take samples as described in 5.1.3.1.3. SIST EN 15028:2006
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