1、August 2013 Translation by DIN-Sprachendienst.English price group 12No 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
2、 71.100.80!%(6“2051996www.din.deDDIN EN 12174Chemicals used for treatment of water intended for humanconsumption Sodium hexafluorosilicate;English version EN 12174:2013,English translation of DIN EN 12174:2013-08Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Natriumhexafluorsilika
3、t;Englische Fassung EN 12174:2013,Englische bersetzung von DIN EN 12174:2013-08Produits chimiques utiliss pour le traitement de leau destine la consommationhumaine Hexafluorosilicate de sodium;Version anglaise EN 12174:2013,Traduction anglaise de DIN EN 12174:2013-08SupersedesDIN EN 12174:2006-10www
4、.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.2007.13 DIN EN 12174:2013-08 2 A comma is used as the decimal marker. National foreword This document (EN 12174:2013) has been prepared by Technical Committee CEN/TC 164 “Water supply” (
5、Secretariat: (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Wasserwesen (Water Practice Standards Committee), Working Committee NA 119-04-02 AA Wasseraufbereitung. Users of this standard are advised of the reservations stated in the Intr
6、oduction of the European Standard and should note that national regulations exist in Germany dealing with water for human consumption, in particular the Trinkwasserverordnung (TrinkwV 2001) (German Drinking Water Ordinance). Since, as of the publication of this standard, sodium hexafluorosilicate is
7、 not mentioned in the list of substances for treatment and disinfection of water in accordance with article 11 of the Trinkwasserverordnung 2001, it shall not be used for the treatment of drinking water. The DIN Standards corresponding to the International Standards referred to in this document are
8、as follows, whereby EN ISO Standards are only listed below if these have not been published as DIN EN ISO Standards with the same number: EN ISO 3696 DIN ISO 3696 Amendments This standard differs from DIN EN 12174:2006-10 as follows: a) specifications concerning hazard and safety related symbols hav
9、e been brought in line with the “Globally Harmonized System of Classification, Labelling and Packaging of Chemicals (GHS)” (Global harmonisiertes System zur Einstufung und Kennzeichnung von Chemikalien). Previous editions DIN EN 12174: 2001-12, 2006-10 National Annex NA (informative) Bibliography DI
10、N ISO 3696, Water for analytical laboratory use Specification and test methods Verordnung ber die Qualitt von Wasser fr den menschlichen Gebrauch (Trinkwasserverordnung TrinkwV 2001) (German Drinking Water Ordinance), as of 28 November 2011 (BGBI. (German Federal Law Gazette) I, 2011, No. 61, pp. 23
11、702396), as amended by the second Ordinance amending the Trinkwasserverordnung (TrinkwVndV 2) (German Drinking Water Ordinance) of 5 December 2011 (BGBl. (German Federal Law Gazette) I, 2012, No. 58, pp. 25622567)*)*) Obtainable from: Bundesministerium der Justiz (German Federal Ministry of Justice)
12、 (Internet: http:/www.gesetze-im-internet.de). EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12174 May 2013 ICS 71.100.80 Supersedes EN 12174:2006English Version Chemicals used for treatment of water intended for human consumption - Sodium hexafluorosilicate Produits chimiques utiliss pour le
13、 traitement de leau destine la consommation humaine - Hexafluorosilicate de sodium Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Natriumhexafluorsilikat This European Standard was approved by CEN on 28 March 2013. CEN members are bound to comply with the CEN/CENELEC Internal Re
14、gulations 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 me
15、mber. 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.
16、 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, Polan
17、d, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form a
18、nd by any means reserved worldwide for CEN national Members. Ref. No. EN 12174:2013: EEN 12174:2013 (E) 2 Contents Page Foreword . 3 Introduction 4 1 Scope 5 2 Normative references . 5 3 Description . 5 3.1 Identification . 5 3.2 Commercial form 6 3.3 Physical properties 6 3.4 Chemical properties .
19、7 4 Purity criteria 7 4.1 General . 7 4.2 Composition of commercial product . 7 4.3 Impurities and main by-products 7 4.4 Chemical parameters . 8 5 Test methods 8 5.1 Sampling . 8 5.2 Analyses . 8 6 Labelling - Transportation - Storage . 14 6.1 Means of delivery . 14 6.2 Labelling according to the E
20、U legislation 14 6.3 Transportation regulations and labelling 14 6.4 Marking . 15 6.5 Storage . 15 Annex A (informative) General information on sodium hexafluorosilicate 16 A.1 Origin 16 A.2 Use 16 Annex B (normative) General rules relating to safety . 17 B.1 Rules for safe handling and use 17 B.2 E
21、mergency procedures 17 Bibliography 18 DIN EN 12174:2013-08 EN 12174:2013 (E) 3 Foreword This document (EN 12174:2013) 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 standar
22、d, either by publication of an identical text or by endorsement, at the latest by November 2013, and conflicting national standards shall be withdrawn at the latest by November 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
23、 CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12174:2006. Significant differences between this edition and EN 12174:2006 are as follows: the replacement of warning and safety precautions notes by labelling according to Re
24、gulation (EC) No 1272/2008. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republ
25、ic 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. DIN EN 12174:2013-08 EN 12174:2013 (E) 4 Introduction In re
26、spect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this document: a) this document 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
27、 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 document does not confer or imply acceptance or approval of the product in any of the Membe
28、r States of the EU or EFTA. The use of the product covered by this document is subject to regulation or control by National Authorities. DIN EN 12174:2013-08 EN 12174:2013 (E) 5 1 Scope This European Standard is applicable to sodium hexafluorosilicate used for treatment of water intended for human c
29、onsumption. It describes the characteristics of sodium hexafluorosilicate and specifies the requirements and the corresponding test methods for sodium hexafluorosilicate. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use of sodium hexa
30、fluorosilicate (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
31、 document (including any amendments) applies. EN ISO 3696:1995, 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 4281, Sodium hexafluorosilicate for industrial use Determination of fre
32、e acidity and total hexafluorosilicate content Titrimetric method ISO 4793, Laboratory sintered (fritted) filters Porosity grading, classification and designation ISO 5444, Sodium fluorosilicate for industrial use Determination of loss in mass at 105 degrees C ISO 5993, Sodium hydroxide for industri
33、al use Determination of mercury content Flameless atomic absorption spectrometric method ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 6353-1, Reagents for chemical analysis Part 1: General test methods ISO 8213, Chemical products for industrial use Sampling techniques Solid
34、 chemical products in the form of particles varying from powders to coarse lumps 3 Description 3.1 Identification 3.1.1 Chemical name Disodium hexafluorosilicate. 3.1.2 Synonym or common name Sodium silicofluoride, sodium hexafluorosilicate. 3.1.3 Relative molecular mass 188,055. 3.1.4 Empirical for
35、mula Na2SiF6. DIN EN 12174:2013-08 EN 12174:2013 (E) 6 3.1.5 Chemical formula Na2SiF6. 3.1.6 CAS-Registry Number1)16893-85-9. 3.1.7 EINECS reference2)240-934-8. 3.2 Commercial form The product is a crystalline powder. 3.3 Physical properties 3.3.1 Appearance and odour The product is a colourless, od
36、ourless fine crystalline powder. 3.3.2 Density The particle density of the crystals is 2,8 g/cm3at 20 C. The bulk density of the product is approximately 1,5 g/cm3at 20 C. 3.3.3 Solubility The solubility of the product in water is 7 g/l at 20 C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling po
37、int at 100 kPa3)Not applicable. 3.3.6 Crystallisation point The product melts above 500 C. 3.3.7 Specific heat Not known. 1)Chemical Abstracts Service Registry Number. 2)European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. DIN EN 12174:2013-08 EN 12174:2013 (E) 7 3.3.8
38、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 pH value of a saturated aqueous solution (7 g/l) of sodium hexafluorosilicate is approximately 10. Sodium hexafl
39、uorosilicate reacts with acids to form hydrofluoric acid. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for sodium hexafluorosilicate used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the produc
40、t. 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 puri
41、ty 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 products not stated in this document. Limits have been given for impurities and chemicals parameters where these are likely to be p
42、resent 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 conte
43、nt of sodium hexafluorosilicate shall not be less than a mass fraction of 98 % (Na2SiF6). The concentration of sodium hexafluorosilicate shall be within 5 % of the manufacturers declared value. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. Ta
44、ble 1 Impurities Impurity Limit in mass fraction in % of commercial product Water- insoluble matter max.0,5 Moisture max. 0,3 DIN EN 12174:2013-08 EN 12174:2013 (E) 8 4.4 Chemical parameters The product shall conform to the requirements specified in Table 2. Table 2 Chemical parameters Parameter Lim
45、it mg/kg of commercial product Antimony (Sb) max. 80 Arsenic (As) max. 400 Cadmium (Cd) max. 40 Chromium (Cr) max. 400 Lead (Pb) max. 400 Mercury (Hg) max. 10 Nickel (Ni) max. 400 Selenium (Se) max. 80 NOTE Other chemical parameters and indicator parameters are not relevant in sodium hexafluorosilic
46、ate because the raw materials used in the manufacturing process are free of them. For parametric values of sodium hexafluorosilicate 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
47、laboratory sample(s) required by the relevant procedure described in ISO 8213. NOTE Sodium hexafluorosilicate presents a toxic hazard through inhalation of dust (see B.1). 5.2 Analyses 5.2.1 Main product The sodium hexafluorosilicate content shall be determined in accordance with ISO 4281. This stan
48、dard includes the determination of free acid. 5.2.2 Impurities 5.2.2.1 Insoluble matters 5.2.2.1.1 Procedure Weigh and transfer to a beaker 2 g of the sample, which has previously been dried at 105 C to constant mass. Dissolve in 500 ml of hot water. Generally, 15 min to 30 min is sufficient time. DIN EN 12174:2013-08 EN 12174:2013 (E) 9 Filter through a tared Gooch crucible or a tared fritted-glass filter of medium porosity (porosity P 16 according to ISO 4793). Wash with at least six s
