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)

Safety Information

RIDADR 

UN 2856

HS Code 

2826908090

Toxicity

LD in guinea pigs (mg/kg): 250 orally, 450 s.c. (Waldbott)

MSDS

• Language:English Provider:Calcium hexafluorosilicate

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 (16925-39-6)Related Product Information

• Calcium nitrite
• Calcium oxide
• Silicic acid (H2SiO3), calcium salt (1:1)
• Calcium silicate
• Calcium phosphate
• Sodium fluorosilicate
• Fluorosilicate
• Calcium chloride
• Calcium carbonate
• Calcium carbide
• Calcium Propionate
• Hexafluorosilicic acid
• CALCIUM SILICIDE
• CALCIUM
• CALCIUM SILICIDE
• Silicon Tetrafluoride
• CALCIUM HEXAFLUOROSILICATE DIHYDRATE
• Calcium fluoride