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Hexafluorosilicic acid Structure

Hexafluorosilicic acid

Chemical 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
form  Liquid
pka 1.83[at 20 ℃]
Specific Gravity 1.38 (40%)
color  Clear colorless
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
CAS DataBase Reference 16961-83-4(CAS DataBase Reference)
Indirect Additives used in Food Contact Substances FLUOSILICIC ACID
EWG's Food Scores 1
FDA UNII 53V4OQG6U1
EPA Substance Registry System Fluosilicic acid (16961-83-4)

Safety

Symbol(GHS)
Signal wordDanger
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
Hazardous Substances Data 16961-83-4(Hazardous Substances Data)
Toxicity LD50 oral in rat: 430mg/kg
NFPA 704:
0
3 0

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Hexafluorosilicic acid Chemical Properties,Usage,Production

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