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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Identification

Chemical structure
Display Name:
Hexafluorosilicic acid
EC Number:
241-034-8
EC Name:
Hexafluorosilicic acid
CAS Number:
16961-83-4
Molecular formula:
F6Si.2H
IUPAC Name:
Dihydrogen hexafluorosilicate

Type of Substance

Composition:
mono-constituent substance
Origin:
inorganic

Substance Identifiers open all close all

  • Acide fluorosilicique
  • Acide fluosilicique
  • Acide fluosilicique
  • Acido fluosilicico
  • DIHYDROGEN HEXAFLUOROSILICATE(2-)
  • Dihydrogen hexafluorosilicate
  • FLUOROSILICIC ACID
  • FLUOROSILICIC ACID (H2SIF6)
  • FLUOROSILICIC ACID 40% (Solvay Specialty Polymers)
  • FLUOSILICIC ACID
  • FSA
  • Fluorosilicic Acid
  • Fluorosilicic acid
  • HEXAFLUORKIESELSAEURE
  • HEXAFLUOROSILICIC ACID
  • HFS
  • HYDROFLUOROSILICIC ACID
  • HYDROGEN HEXAFLUOROSILICATE
  • Hexafluorosilicic Acid
  • Hexafluosilicic acid
  • Hydrofluorosilicic acid
  • Hydrofluosilicic acid
  • Hydrofluosilicic acid
  • Hydrogen fluorosilicate
  • Hydrogen hexafluorosilicate
  • Hydrogen hexafluorosilicate
  • Hydrosilicofluoric acid
  • Hydrosilicofluororic acid
  • KIESELFLUORWASSERSTOFFSAEURE
  • SILICATE(2-), HEXAFLUORO-, DIHYDROGEN
  • Sand acid
  • Silicate(2-), hexafluoro-, dihydrogen
  • Silicic acid
  • Silicofluoric Acid
  • Silicofluoric acid
  • Silicofluoride
  • Silicofluoride
  • Silicon hexafluoride dihydride
  • Silicon hexafluoride dihydride
  • fluosilicic acid
  • hexafluorosilicic acid
  • hydrofluosilicic acid
  • kwas fluorokrzemowy
  • silicofluoric acid
  • Compositions

    Boundary Composition(s) open all close all

    State Form:
    liquid
    Degree of purity:
    >= 91.75 - <= 100 % (w/w)


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    Impurity 1
    Chemical structure
    Reference substance name:
    Hydrogen fluoride
    EC Number:
    231-634-8
    EC Name:
    Hydrogen fluoride
    CAS Number:
    7664-39-3
    Molecular formula:
    FH
    IUPAC Name:
    fluoride
    State Form:
    liquid
    Degree of purity:
    >= 91.5 - <= 99.75 % (w/w)


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    Impurity 1
    Chemical structure
    Reference substance name:
    Hydrogen fluoride
    EC Number:
    231-634-8
    EC Name:
    Hydrogen fluoride
    CAS Number:
    7664-39-3
    Molecular formula:
    FH
    IUPAC Name:
    fluoride
    State Form:
    liquid
    Degree of purity:
    >= 91 - <= 99.5 % (w/w)


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    Impurity 1
    Chemical structure
    Reference substance name:
    Hydrogen fluoride
    EC Number:
    231-634-8
    EC Name:
    Hydrogen fluoride
    CAS Number:
    7664-39-3
    Molecular formula:
    FH
    IUPAC Name:
    fluoride
    State Form:
    liquid
    Degree of purity:
    >= 90.4 - <= 99 % (w/w)


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    Impurity 1
    Chemical structure
    Reference substance name:
    Hydrogen fluoride
    EC Number:
    231-634-8
    EC Name:
    Hydrogen fluoride
    CAS Number:
    7664-39-3
    Molecular formula:
    FH
    IUPAC Name:
    fluoride

    Legal Entity Composition(s) open all close all

    State Form:
    liquid
    Degree of purity:
    >= 99.731 - <= 100 % (w/w)


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    Impurity 1
    Chemical structure
    Reference substance name:
    Hydrogen fluoride
    EC Number:
    231-634-8
    EC Name:
    Hydrogen fluoride
    CAS Number:
    7664-39-3
    Molecular formula:
    FH
    IUPAC Name:
    fluoride
    State Form:
    liquid


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    State Form:
    liquid


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    State Form:
    liquid


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    State Form:
    liquid
    Degree of purity:
    >= 91.75 - <= 100 % (w/w)


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    Impurity 1
    Chemical structure
    Reference substance name:
    Hydrogen fluoride
    EC Number:
    231-634-8
    EC Name:
    Hydrogen fluoride
    CAS Number:
    7664-39-3
    Molecular formula:
    FH
    IUPAC Name:
    fluoride
    State Form:
    liquid
    Degree of purity:
    >= 91.5 - <= 99.75 % (w/w)


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    Impurity 1
    Chemical structure
    Reference substance name:
    Hydrogen fluoride
    EC Number:
    231-634-8
    EC Name:
    Hydrogen fluoride
    CAS Number:
    7664-39-3
    Molecular formula:
    FH
    IUPAC Name:
    fluoride
    State Form:
    liquid
    Degree of purity:
    >= 91 - <= 99.5 % (w/w)


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    Impurity 1
    Chemical structure
    Reference substance name:
    Hydrogen fluoride
    EC Number:
    231-634-8
    EC Name:
    Hydrogen fluoride
    CAS Number:
    7664-39-3
    Molecular formula:
    FH
    IUPAC Name:
    fluoride
    State Form:
    liquid
    Degree of purity:
    >= 90.4 - <= 99 % (w/w)


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    Impurity 1
    Chemical structure
    Reference substance name:
    Hydrogen fluoride
    EC Number:
    231-634-8
    EC Name:
    Hydrogen fluoride
    CAS Number:
    7664-39-3
    Molecular formula:
    FH
    IUPAC Name:
    fluoride
    State Form:
    liquid
    Degree of purity:
    >= 81 - <= 99.5 % (w/w)


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate
    Impurity 1
    Chemical structure
    Reference substance name:
    Sulphuric acid
    EC Number:
    231-639-5
    EC Name:
    Sulphuric acid
    CAS Number:
    7664-93-9
    Molecular formula:
    H2O4S
    IUPAC Name:
    sulfuric acid
    Impurity 2
    Chemical structure
    Reference substance name:
    Hydrogen chloride
    EC Number:
    231-595-7
    EC Name:
    Hydrogen chloride
    CAS Number:
    7647-01-0
    Molecular formula:
    ClH
    IUPAC Name:
    hydrogen chloride
    Impurity 3
    Chemical structure
    Reference substance name:
    Orthophosphoric acid
    EC Number:
    231-633-2
    EC Name:
    Orthophosphoric acid
    CAS Number:
    7664-38-2
    Molecular formula:
    H3O4P
    IUPAC Name:
    phosphoric acid
    Impurity 4
    Chemical structure
    Reference substance name:
    Hydrogen fluoride
    EC Number:
    231-634-8
    EC Name:
    Hydrogen fluoride
    CAS Number:
    7664-39-3
    Molecular formula:
    FH
    IUPAC Name:
    fluoride
    State Form:
    other: solution


    Constituent 1
    Chemical structure
    Reference substance name:
    Hexafluorosilicic acid
    EC Number:
    241-034-8
    EC Name:
    Hexafluorosilicic acid
    CAS Number:
    16961-83-4
    Molecular formula:
    F6Si.2H
    IUPAC Name:
    Dihydrogen hexafluorosilicate