Home Categories Inorganic chemistry Fluorosilicic acid solution
A4302912

Fluorosilicic acid solution , GR,30.0-32.0% , 16961-83-4

Synonym(s):
Hexafluorosilicic acid;Fluorosilicic acid;Hydrogen hexafluorosilicate;Adrenocorticotropic hormone fragment 1-39;Corticotropin A

CAS NO.:16961-83-4

Empirical Formula: F6H2Si

Molecular Weight: 144.09

MDL number: MFCD00145721

EINECS: 241-034-8

Update time: 2022-07-08

PRODUCT Properties

Boiling point: 108-109°C
Density  1.22 g/mL at 20 °C (lit.) 1.31 g/mL at 25 °C
vapor pressure  23hPa at 19.85℃
refractive index  1.3500
Flash point: 108-109°C
storage temp.  −20°C
solubility  H2O: 1 mg/mL, clear, colorless
pka 1.83[at 20 ℃]
form  Liquid
color  Clear colorless
Specific Gravity 1.38 (40%)
Water Solubility  Miscible with water.
Hydrolytic Sensitivity 0: forms stable aqueous solutions
Merck  14,4182
Exposure limits ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3
Stability: Stable in aqueous solution.
InChIKey AUJBMDCSBIPDEH-UHFFFAOYSA-N

Description and Uses

Hexafluorosilicic acid is a kind of inorganic acid. It is majorly used for the fluoridation of water in United State to minimize the incidence of dental caries and dental fluorosis. For chemical synthesis, it is majorly used for the manufacturing of aluminum fluoride and cryolite as well as many kinds of hexafluorosilicate salts. It can also be used for the production of silicon and silicon dioxide. It can also be used as an electrolyte in the Betts electrolytic process for refining lead. It is also a specialized reagent in organic synthesis for cleaving Si–O bonds of silyl ethers.

A fluoride source with both protic and Lewis acid properties providing efficient cleavage of silicon–oxygen bonds, e.g. silyl ether deprotection.

Safety

Symbol(GHS) 
GHS05,GHS06
Signal word  Danger
Hazard statements  H302-H311-H314
Precautionary statements  P270-P280-P301+P312-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  C
Risk Statements  34-35-20/21/22
Safety Statements  26-36/37/39-45-27
RIDADR  UN 1778 8/PG 2
WGK Germany  3
RTECS  VV8225000
8-10
Hazard Note  Corrosive
TSCA  Yes
HazardClass  8
PackingGroup  II
HS Code  28111990
Toxicity LD50 oral in rat: 430mg/kg

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