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Calcium hexafluorosilicate

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Calcium hexafluorosilicate Basic information

Product Name:
Calcium hexafluorosilicate
Synonyms:
  • Silicate(2-),hexafluoro-,calcium(1:1)
  • Calcium fiuosilicate
  • CALCIUM FLUOSILICATE
  • CALCIUM FLUOROSILICATE
  • calcium hexafluorosilicate
  • Calcium hexafiuorosilicate
  • CALCIUM SILICAFLUORIDE
  • CALCIUM SILICOFLUORIDE
CAS:
16925-39-6
MF:
CaF6Si
MW:
182.15
EINECS:
240-991-9
Mol File:
16925-39-6.mol
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Calcium hexafluorosilicate Chemical Properties

Density 
2.25
solubility 
insoluble in acetone; reacts with hot H2O
form 
colorless tetragonal crystals
color 
colorless tetragonal crystals, crystalline
Water Solubility 
insoluble cold H2O, partially decomposed in hot H2O [MER06]
Solubility Product Constant (Ksp)
pKsp: 3.09
CAS DataBase Reference
16925-39-6(CAS DataBase Reference)
EPA Substance Registry System
Silicate(2-), hexafluoro-, calcium (1:1) (16925-39-6)
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Safety Information

RIDADR 
UN 2856
HS Code 
2826908090
Toxicity
LD in guinea pigs (mg/kg): 250 orally, 450 s.c. (Waldbott)

MSDS

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Calcium hexafluorosilicate Usage And Synthesis

Preparation

CaCO3 +H2SiF6 →CaSiF6 +H2O + CO2
Calcium hexafluorosilicate can be prepared by reacting a large excess of CaCO3 or Ca(NO3)2 with a high concentration of H 2SiF6.

Chemical Properties

colorless, tetr; powder(s); obtained by reaction of a Ca salt and H2SiF6; used as a flotation agent and insecticide [HAW93] [MER06] [CRC10]

Uses

In wood, rubber, textile industries; flotation agent; insecticide.

Safety Profile

Poison by ingestion and subcutaneous routes. See also CALCIUM COMPOUNDS. When heated to decomposition it emits toxic fumes of F-.

Calcium hexafluorosilicate Supplier

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