1、March 2014 Translation by DIN-Sprachendienst.English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 7
2、1.100.80!%,0“2099313www.din.deDDIN EN 16399Chemicals used for treatment of swimming pool water Sodium thiosulfate;English version EN 16399:2013,English translation of DIN EN 16399:2014-03Produkte zur Aufbereitung von Schwimm- und Badebeckenwasser Natriumthiosulfat;Englische Fassung EN 16399:2013,Eng
3、lische bersetzung von DIN EN 16399:2014-03Produits chimiques utiliss pour le traitement de leau des piscines Thiosulfate de sodium;Version anglaise EN 16399:2013,Traduction anglaise de DIN EN 16399:2014-03www.beuth.deDocument comprises 14 pagesIn case of doubt, the German-language original shall be
4、considered authoritative.02.14 DIN EN 16399:2014-03 2 A comma is used as the decimal marker. National foreword This document (EN 16399:2013) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was th
5、e Normenausschuss Wasserwesen (Water Practice Standards Committee), Working Committee NA 119-04-02 AA Wasseraufbereitung. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16399 December 2013 ICS 71.100.80 English Version Chemicals used for treatment of swimming pool water - Sodium thiosulfate Pr
6、oduits chimiques utiliss pour le traitement de leau des piscines - Thiosulfate de sodium Produkte zur Aufbereitung von Schwimm- und Badebeckenwasser - Natriumthiosulfat This European Standard was approved by CEN on 26 October 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regula
7、tions 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
8、. 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
9、 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, P
10、ortugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in an
11、y form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16399:2013: EEN 16399:2013 (E) 2 Contents Page Foreword 3 Introduction . 4 1 Scope 5 2 Normative references 5 3 Description . 5 3.1 Identification . 5 3.1.1 Chemical name . 5 3.1.2 Synonym or commons names 5 3.1.3 Relat
12、ive molecular mass . 5 3.1.4 Empirical formula. 5 3.1.5 Chemical formula . 5 3.1.6 CAS Registry Number . 5 3.1.7 EINECS reference 5 3.2 Commercial form . 6 3.3 Physical properties 6 3.3.1 Appearance 6 3.3.2 Density 6 3.3.3 Solubility in water 6 3.3.4 Vapour pressure 6 3.3.5 Boiling point at 100 kPa)
13、. 6 3.3.6 Melting point . 6 3.3.7 Specific heat . 6 3.3.8 Viscosity, dynamic. 6 3.3.9 Critical temperature . 6 3.3.10 Critical pressure. 6 3.3.11 Physical hardness . 6 3.4 Chemical properties 7 4 Purity criteria 7 4.1 General 7 4.2 Composition of commercial product . 7 4.3 Chemical parameters 7 5 Te
14、st methods 8 6 Labelling - Transportation - Storage 8 6.1 Means of delivery . 8 6.2 Labelling according to the EU legislation)8 6.3 Transportation regulations and labelling 8 6.4 Marking . 9 6.5 Storage 9 6.5.1 Long term stability . 9 6.5.2 Storage incompatibilities 9 Annex A (informative) General i
15、nformation on sodium thiosulfate . 10 A.1 Origin 10 A.2 Use 10 A.3 General rules relating to safety 11 Bibliography 12 DIN EN 16399:2014-03 EN 16399:2013 (E) 3 Foreword This document (EN 16399:2013) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held
16、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 June 2014, and conflicting national standards shall be withdrawn at the latest by June 2014. Attention is drawn to the possibility that so
17、me 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. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to imp
18、lement 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, Romani
19、a, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 16399:2014-03 EN 16399:2013 (E) 4 Introduction In respect of potential adverse effects on the quality of water for swimming pools, caused by the product covered by this European Standard: 1) this European Standa
20、rd provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; 2) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of
21、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
22、. DIN EN 16399:2014-03 EN 16399:2013 (E) 5 1 Scope This European Standard is applicable only to sodium thiosulfate and not to mixtures with other chemicals used for treatment of swimming pool water. It describes the characteristics of sodium thiosulfate and specifies the requirements and the corresp
23、onding test methods for sodium thiosulfate. It gives information on its use in swimming water treatment. It also determines the rules relating to safe handling and use (see Annex A). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and
24、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 12125, Chemicals used for treatment of water intended for human consumption Sodium thiosulfate 3 D
25、escription 3.1 Identification 3.1.1 Chemical name Sodium thiosulfate. 3.1.2 Synonym or commons names Sodium thiosulfate, sodium hyposulfite. 3.1.3 Relative molecular mass 158,11 (anhydrous). 3.1.4 Empirical formula Na2S2O3. 3.1.5 Chemical formula Na2S2O3. 3.1.6 CAS1)Registry Number 7772-98-7 (anhydr
26、ous); 10102-17-7 (pentahydrate). 3.1.7 EINECS2)reference 231-867-5. 1) CAS : Chemical Abstracts Service. 2) EINECS : European INventory of Existing Commercial Chemical Substances. DIN EN 16399:2014-03 EN 16399:2013 (E) 6 3.2 Commercial form The product is a crystalline powder. 3.3 Physical propertie
27、s 3.3.1 Appearance The hydrated product is colourless crystal. The anhydrous product is a white powder. 3.3.2 Density The particle density of the hydrated product is 1,69 g/cm3to 1,73 g/cm3at 20 C. 3.3.3 Solubility in water The solubility of the product in water is 700 g/l at 20 C (anhydrous); for p
28、entahydrate: 2910 g/l at 45 C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3)Not applicable. 3.3.6 Melting point The product starts to decompose at 45 C to 50 C. 3.3.7 Specific heat Not known. 3.3.8 Viscosity, dynamic Not applicable. 3.3.9 Critical temperature Not applicable.
29、 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3) 100 kPa = 1 bar. DIN EN 16399:2014-03 EN 16399:2013 (E) 7 3.4 Chemical properties The pH value of a diluted aqueous solution of sodium thiosulfate is approximately neutral (6,5 to 8). Sodium thiosulfate dissolves s
30、ilver halogenids and other silver salts. At elevated temperatures (50 C) sulfur dioxide is generated. Sodium thiosulfate releases sulfur dioxide when mixed with acids. Sodium thiosulfate reacts violently with oxidising agents; e.g. with sodium hypochlorite or hydrogen peroxide. It shall not get into
31、 contact with acids, iodine, lead and silver salts. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for sodium thiosulfate used for the treatment of water for swimming pools. Limits are given for impurities commonly present in the product. Depending on
32、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
33、of water for swimming pools, 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 toxic substances where these are likely to be present in significant quan
34、tities from the current production process and raw materials. If the production process or raw materials leads 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 concentration of sodium thiosu
35、lfate anhydrous shall not be less than a mass fraction of 95 % of Na2S2O3. The concentration of sodium thiosulfate pentahydrate shall not be less than a mass fraction of 95 % of Na2S2O3 5H2O.4.3 Chemical parameters The product shall conform to the requirements specified in Table 1. DIN EN 16399:2014
36、-03 EN 16399:2013 (E) 8 Table 1 Chemical parameters Parameter Limit in mg/kg Arsenic (As) max. 0,5 Cadmium (Cd) max. 0,1 Chromium (Cr) max. 5 Mercury (Hg) max. 0,1 Nickel (Ni) max. 5 Lead (Pb) max. 5 Antimony (Sb) max. 2 Selenium (Se) max. 2 NOTE Pesticides and polycyclic aromatic hydrocarbons and c
37、yanides (CN-) are not relevant in sodium thiosulfate because the raw materials used in the manufacturing are free of them. 5 Test methods The sampling and the analytical methods are those described in EN 12125. 6 Labelling - Transportation - Storage 6.1 Means of delivery Sodium thiosulfate shall be
38、delivered in paper bags with polyethylene lining, or in polyethylene bags, with net contents of 1 kg to 50 kg. 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 prep
39、ared before use. 6.2 Labelling according to the EU legislation4)At the date of the publication of this European Standard, no labelling requirements apply to sodium thiosulfate. The regulation 1, and its amendments for the purposes of its adaptation to technical and scientific progress contains a lis
40、t of substances classified by the EU. Substances not listed in this regulation should be classified on the basis of their intrinsic properties according to the criteria in the regulation by the person responsible for the marketing of the substance. 6.3 Transportation regulations and labelling Sodium
41、 thiosulfate is not classified as a dangerous product for road, rail, sea and air transportation. 4) See 1. DIN EN 16399:2014-03 EN 16399:2013 (E) 9 6.4 Marking The marking shall include the following: the name “sodium thiosulfate” and trade name; the net mass; the name and address of the supplier a
42、nd/or manufacturer; the statement “This product conforms to EN 16399”. 6.5 Storage 6.5.1 Long term stability Product is stable when stored in containers in a cool and dry place. 6.5.2 Storage incompatibilities The product shall be kept away from acids, such as hydrochloric acid and sulfuric acid, to
43、 avoid the risk of sulfur dioxide evolution. The product shall be kept away from oxidising substances, such as sodium hypochlorite and hydrogen peroxide. DIN EN 16399:2014-03 EN 16399:2013 (E) 10 Annex A (informative) General information on sodium thiosulfate A.1 Origin A.1.1 Raw materials Sodium th
44、iosulfate is manufactured from sodium hydroxide, sodium hydrogen sulfite (solution) and sulfur. A.1.2 Manufacturing process The raw materials react under pressure at elevated temperatures. A.2 Use A.2.1 Function Sodium thiosulfate is used as a reducing agent to remove excess chlorine, chlorine dioxi
45、de or ozone in the swimming pool water: 22 3 2 2 4Na S O 4 Cl 5 H O 2 NaHSO 8 HCl.+ + A.2.2 Form in which it is used It is used as delivered. A.2.3 Treatment dose The treatment dose depends on the content of oxidants in the water. For chlorine, for example, in water the stoichiometric dose is 0,56 m
46、g of Na2S2O3for 1 mg of Cl2, but in practice an excess over the stoichiometric dose can be required. A.2.4 Means of application It is applied using a metering pump or directly into the swimming pool. A.2.5 Secondary effects The use of sodium thiosulfate increases the content of sodium and sulfate an
47、d can consume oxygen dissolved in the water. A.2.6 Removal of excess product The excess product is removed by oxidation. DIN EN 16399:2014-03 EN 16399:2013 (E) 11 A.3 General rules relating to safety A.3.1 Rules for safe handling and use The supplier will provide current safety instructions. A.3.2 E
48、mergency procedures A.3.2.1 First aid If sodium thiosulfate is in contact with the eyes or the skin, it is recommended to rinse with plenty of water. If it is swallowed, it is recommended to seek immediately medical advice. A.3.2.2 Spillage It is recommended to collect and to remove any spillage avoiding the formation of dust. Any remaining product can be flushed away with plenty of water to which an oxidising agent is added. A.3.2.3 Fire The product is not combustible. Decomposition can be caused by fire with release of sulf
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