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ammonium hexafluorosilicate

Product name ammonium hexafluorosilicate
Synonyms ammonium silicofluoride
GOST no data
CAS 16919-19-0

Ammonium hexafluorosilicate - colorless crystals, decompose higher 175°C.


  • Interaction of H2SiF6 with NH3;
  • Bubbling of SiF4 containing in waste gases of superphosphate manufacturing through NH4F solutions with following crystallization.


  • White black (SiO2 with high surface area) production by gel from reaction below ignition.

    (NH4)2SiF6 + 4NH3 + (n+2)H2O --> 6NH4F + SiO2*nH2O

  • Ammonium hexafluorosilicate is an intermediate product in production of NH2HF2, NH4F, CaF2, NaHF2 and other fluorides.
  • Component for glass etching.

  • Manufacturer(s) JSC Ammofos Cherepovets
    OJSC Halogen

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