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Sodium fluorosilicate

Sodium fluorosilicate
Names
Preferred IUPAC name
Sodium fluorosilicate
Systematic IUPAC name
Sodium hexafluoridosilicate(2–)
Other names
Disodium hexafluorosilicate/sodium fluosilicate/sodium silicofluoride
Identifiers
3D model (Jmol)
ChemSpider
ECHA InfoCard 100.037.198
EC Number 240-934-8
PubChem CID
RTECS number VV8410000
UN number 2674
Properties
Na2[SiF6]
Appearance white granular powder
Odor odorless
Density 2.7 g/cm3
0.64 g/100 mL (20 °C)
1.27 g/100 mL (50 °C)
2.45 g/100 mL (100 °C)
Solubility insoluble in alcohol
1.312
Structure
hexagonal
Hazards
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Lethal dose or concentration (LD, LC):
70 mg/kg (mouse, oral)
125 mg/kg (rabbit, oral)
Related compounds
Other cations
Ammonium hexafluorosilicate

Fluorosilicic acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Fluorosilicic acid

Sodium fluorosilicate is a compound with the chemical formula Na2[SiF6].

Sodium fluorosilicate is made by neutralizing fluorosilicic acid with sodium chloride or sodium sulfate.

It is used in some countries as additives for water fluoridation, opal glass raw material, ore refining, or other fluoride chemical (like sodium fluoride, magnesium silicofluoride, cryolite, aluminum fluoride) production.


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