Calcium hexafluorosilicate Property

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

RIDADR 

UN 2856

HS Code 

2826908090

Toxicity

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

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Precautionary statements

P280Wear protective gloves/protective clothing/eye protection/face protection.

P284Wear respiratory protection.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

Calcium hexafluorosilicate Chemical Properties,Usage,Production

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-.