SIST EN 12174:2001
(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
Scope
This European Standard 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.
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumhexafluorosilicat
Anwendungsbereich
Diese Europäische Norm gilt für Natriumhexafluorosilicat zur Aufbereitung von Wasser für den menschlichen Gebrauch. Sie beschreibt die Eigenschaften von Natriumhexafluorosilicat und legt die Anforderungen sowie die entsprechenden Prüfverfahren für Natriumhexafluorosilicat fest. Sie gibt Informationen für seine Anwendung in der Wasseraufbereitung.
Produits chimiques utilisés pour le traitement de l'eau destinée a la consommation humaine - Hexafluorosilicate de sodium
La présente Norme européenne est applicable a l'hexafluorosilicate de sodium utilisé pour le traitement de l'eau destinée a la consommation humaine. Elle décrit les caractéristiques de l'hexafluorosilicate de sodium et spécifie les prescriptions et les méthodes d'essai correspondant a l'hexafluorosilicate de sodium. Elle donne des informations pour son emploi dans le traitement de l'eau.
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 - NatriumhexafluorosilicatProduits 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 12174:2001SIST EN 12174:2001en01-december-2001SIST EN 12174:2001SLOVENSKI
STANDARD
SIST EN 12174:2001
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12174August 2001ICS 71.100.80English 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 - NatriumhexafluorosilicatThis European Standard was approved by CEN on 23 June 2001.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 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 Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12174:2001 ESIST EN 12174:2001
EN 12174:2001 (E)2ContentspageForeword.3Introduction.41Scope.52Normative references.53Description.53.1Identification.53.2Commercial form.63.3Physical properties.63.4Chemical properties.74Purity criteria.74.1General.74.2Composition of commercial product.74.3Impurities and main by-products.74.4Chemical parameters.75Test methods.85.1Sampling.85.2Analyses.86Labelling - Transportation - Storage.136.1Means of delivery.136.2Risk and safety labelling according to the EU Directives .136.3Transportation regulations and labelling.146.4Marking.146.5Storage.14Annex A (informative)
General information on sodium hexafluorosilicate.15A.1Origin.15A.2Use.15Annex B (normative)
General rules relating to safety.16B.1Rules for safe handling and use.16B.2Emergency procedures.16Bibliography.17SIST EN 12174:2001
EN 12174:2001 (E)3ForewordThis European Standard has been prepared by Technical Committee CEN/TC 164 "Water supply", the secretariatof which is held by AFNOR.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by February 2002, and conflicting national standards shall be withdrawn at the latestby February 2002.Annex A is informative.Annex B is normative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.SIST EN 12174:2001
EN 12174:2001 (E)4IntroductionIn respect of potential adverse effects on the quality of water intended for human consumption, caused by theproduct covered by this Standard :a) this Standard provides no information as to whether the product may be used without restriction in any of theMember States of the EU or EFTA ;b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulationsconcerning the use and/or the characteristics of this product remain in force.SIST EN 12174:2001
EN 12174:2001 (E)51 ScopeThis European Standard is applicable to sodium hexafluorosilicate used for treatment of water intended for humanconsumption. It describes the characteristics of sodium hexafluorosilicate and specifies the requirements and thecorresponding test methods for sodium hexafluorosilicate. It gives information on its use in water treatment.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).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 hexafluorosilicatecontent - Titrimetric method.ISO 4793, Laboratory sintered (fritted) filters - Porosity grading, classification and designation.ISO 5444, Sodium hexafluorosilicate for industrial use - Determination of loss in mass at 105 °C.ISO 5993, Sodium hydroxide for industrial use - Determination of mercury content - Flameless atomic absorptionspectrometric 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 ofparticles varying from powders to coarse lumps.3 Description3.1 Identification3.1.1 Chemical nameDisodium hexafluorosilicate.3.1.2 Synonym or common nameSodium silicofluoride, sodium hexafluorosilicate.3.1.3 Relative molecular mass188,055.3.1.4 Empirical formulaNa2SiF6.SIST EN 12174:2001
EN 12174:2001 (E)63.1.5 Chemical formulaNa2SiF6.3.1.6 CAS-Registry Number 1)16893-85-9.3.1.7 EINECS reference 2)240-934-8.3.2 Commercial formThe product is a crystalline powder.3.3 Physical properties3.3.1 Appearance and odourThe product is a colourless, odourless fine crystalline powder.3.3.2 DensityThe 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 SolubilityThe solubility of the product in water is 7 g/l at 20 °C.3.3.4 Vapour pressureNot applicable.3.3.5 Boiling point at 100 kPa 3)Not applicable.3.3.6 Crystallisation pointThe product melts above 500 °C.3.3.7 Specific heatNot known.
1) Chemical Abstracts Service Registry Number.2) European Inventory of Existing Commercial Chemical Substances.3) 100 kPa = 1 bar.SIST EN 12174:2001
EN 12174:2001 (E)73.3.8 Viscosity, dynamicNot applicable.3.3.9 Critical temperatureNot applicable.3.3.10 Critical pressureNot applicable.3.3.11 Physical hardnessNot applicable.3.4 Chemical propertiesThe 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 criteria4.1 GeneralLimits have been given for impurities and toxic substances where these are likely to be present in significantquantities from the current production process and raw materials. If a change in the production process or rawmaterials leads to significant quantities of other impurities or by-products being present, this shall be notified to theuser.4.2 Composition of commercial productThe content of sodium hexafluorosilicate shall not be less than 98 per cent by mass (% (m/m)) (Na2SiF6).4.3 Impurities and main by-productsThe content of insoluble matter shall not exceed 0,5 % (m/m).The content of moisture shall not exceed 0,3 % (m/m).4.4 Chemical parametersThe product shall conform to the requirements specified in Table 1.SIST EN 12174:2001
EN 12174:2001 (E)8Table 1 — Chemical parametersParameterLimitmg/kg of commercialproductAntimony (Sb)max.80Arsenic (As)max.400Cadmium (Cd)max.40Chromium (Cr)max
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