EN 12175:2013

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Heksafluorosilicijeva kislinaProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - HexafluorkieselsäureProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Acide hexafluorosiliciqueChemicals used for treatment of water intended for human consumption - Hexafluorosilicic acid71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12175:2013SIST EN 12175:2014en,fr,de01-januar-2014SIST EN 12175:2014SLOVENSKI
STANDARDSIST EN 12175:20061DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12175
May 2013 ICS 71.100.80 Supersedes EN 12175:2006English Version
Chemicals used for treatment of water intended for human consumption - Hexafluorosilicic acid
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Acide hexafluorosilicique
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Hexafluorkieselsäure This European Standard was approved by CEN on 28 March 2013.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations 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.
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 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, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
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B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12175:2013: ESIST EN 12175:2014

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 General . 8 5.2 Sampling . 8 5.3 Analyses . 9 6 Labelling - Transportation - Storage . 17 6.1 Means of delivery . 17 6.2 Labelling according to the EU legislation . 17 6.3 Transportation regulations and labelling . 17 6.4 Marking . 18 6.5 Storage . 18 Annex A (informative)
General information on hexafluorosilicic acid . 19 A.1 Origin . 19 A.2 Use . 19 Annex B (normative)
General rules relating to safety . 20 B.1 Rules for safe handling and use . 20 B.2 Emergency procedures . 20 Bibliography. 21
H2SiF6. 3.1.6 CAS-Registry Number1) 16961-83-4. 3.1.7 EINECS reference2) 241-034-8. 3.2 Commercial form The product is an aqueous solution. 3.3 Physical properties 3.3.1 Appearance and odour The product is a clear, colourless liquid with a pungent odour. 3.3.2 Density The density of a mass fraction 35 % solution at 25 °C is 1,35 g/ml. The density of a mass fraction 20 % solution at 25 °C is 1,18 g/ml. 3.3.3 Solubility (in water) The product is miscible in any proportion. 3.3.4 Vapour pressure The vapour pressure at 20 °C is approximately 3 kPa3). 3.3.5 Boiling point at 100 kPa The product boils and decomposes at 110 °C.
3.3.6 Crystallisation point A solution of mass fraction of 35 % crystallises at -30 °C and of a mass fraction of 20 % crystallises at -11,6 °C. 3.3.7 Specific heat Not known. 3.3.8 Viscosity dynamic A solution of a mass fraction of 20 % has a dynamic viscosity of 1,4 MPa.s at 25 °C.
1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. SIST EN 12175:2014

max. 0,75 Free hydrogen fluoride as HF
max. 1,5 SIST EN 12175:2014
mg/kg H2SiF6 (100 %)
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 hexafluorosilicic acid because the raw materials used in the manufacturing process are free of them. For parametric values of hexafluorosilicic acid on trace metal content in drinking water, see [1]. 5 Test methods 5.1 General SAFETY PRECAUTIONS Hexafluorosilicic acid shall be handled with extreme care, see B.1. All equipment in contact with hexafluorosilicic acid shall be made of plastics (for example polyethylene or polytetrafluoroethylene (PTFE); avoid contact with glass. 5.2 Sampling 5.2.1 General Observe the general recommendations of ISO 3165 and take account of ISO 6206. The sampling is carried out at the premises of the manufacturer of the hexafluorosilicic acid unless the customer has adequate facilities to carry out this operation safely at his own premises. 5.2.2 Sampling from drums and bottles 5.2.2.1 General 5.2.2.1.1 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. 5.2.2.1.2 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 5.2.2.1.3. SIST EN 12175:2014
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