SIST EN 12174:2006
(Main)Chemicals used for treatment of water intended for human consumption - Sodium hexafluorosilicate
Chemicals used for treatment of water intended for human consumption - Sodium hexafluorosilicate
This document is applicable to sodium hexafluorosilicate used for treatment of water intended for human consumption. 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 hexafluorosilicate (see Annex B).
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumhexafluorsilikat
Produits chimiques utilisés pour le traitement de l'eau destinée a la consommation humaine - Hexafluorosilicate de sodium
Le présent document est applicable a l'hexafluorosilicate de sodium utilisé pour le traitement de l'eau destinée a la consommation humaine. Il décrit les caractéristiques de l'hexafluorosilicate de sodium et spécifie les exigences et les méthodes d'essai correspondantes pour ce produit. Il donne des informations pour son emploi dans le traitement de l'eau. Il fixe également les regles relatives a la sécurité d’emploi et de manipulation de l’hexafluorosilicate de sodium (voir annexe B).
Kemikalije, ki se uporabljajo za pripravo pitne vode – Natrijev heksafluorosilikat
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode – Natrijev heksafluorosilikatProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - NatriumhexafluorsilikatProduits chimiques utilisés pour le traitement de l'eau destinée a la consommation humaine - Hexafluorosilicate de sodiumChemicals used for treatment of water intended for human consumption - Sodium hexafluorosilicate71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12174:2006SIST EN 12174:2006en01-oktober-2006SIST EN 12174:2006SLOVENSKI
STANDARDSIST EN 12174:20011DGRPHãþD
SIST EN 12174:2006
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12174July 2006ICS 13.060.20; 71.060.50; 71.100.80Supersedes EN 12174:2001
English VersionChemicals used for treatment of water intended for humanconsumption - Sodium hexafluorosilicateProduits chimiques utilisés pour le traitement de l'eaudestinée à la consommation humaine - Hexafluorosilicatede sodiumProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - NatriumhexafluorsilikatThis European Standard was approved by CEN on 23 June 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 12174:2006: ESIST EN 12174:2006
EN 12174:2006 (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.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 Risk and safety labelling according to the EU Directives .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 Emergency procedures.17 Bibliography.18
SIST EN 12174:2006
EN 12174:2006 (E) 3 Foreword This document (EN 12174:2006) 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 2007, and conflicting national standards shall be withdrawn at the latest by January 2007. This document supersedes EN 12174:2001. A new requirement in subclause 4.2 specifies a tolerance on the manufacturer's declared value of the sodium hexafluorosilicate content. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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.
SIST EN 12174:2006
EN 12174:2006 (E) 4 Introduction In respect 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 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 Member States of the EU or EFTA. The use of the product covered by this document is subject to regulation or control by National Authorities. SIST EN 12174:2006
EN 12174:2006 (E) 5 1 Scope This document is applicable to sodium hexafluorosilicate used for treatment of water intended for human consumption. 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 hexafluorosilicate (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 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 4281, Sodium hexafluorosilicate for industrial use - Determination of free 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 industrial 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 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 formula Na2SiF6 SIST EN 12174:2006
EN 12174:2006 (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, odourless fine crystalline powder. 3.3.2 Density The particle density of the crystals is 2,8 g/cm3 at 20 °C. The bulk density of the product is approximately 1,5 g/cm3 at 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 point 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. SIST EN 12174:2006
EN 12174:2006 (E) 7 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 pH value of a saturated aqueous solution (7 g/l) of sodium hexafluorosilicate is approximately 10. Sodium hexafluorosilicate 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 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 products not stated in this document. Limits have been given for impurities and chemicals 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 content 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 manufacturer's declared value. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. Table 1 — Impurities Impurity Limit in mass fraction in % of commercial product Water- insoluble matter
max. 0,5 Moisture
max. 0,3 SIST EN 12174:2006
EN 12174:2006 (E) 8 4.4 Chemical parameters The product shall conform to the requirements specified in Table 2. Table 2 — Chemical parameters Parameter Limit
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 hexafluorosilicate becau
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