Sodium fluorosilicate

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

Unlike other sodium salts, it has a low solubility in water.

Sodium hexafluorosilicate occurs naturally as the rare mineral malladrite found within some volcanic fumaroles.

Sodium fluorosilicate 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.

[5] It also is an ingredient in some ceramic cements.

Unit cell of the compound
NFPA 704 four-colored diamond Health 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroform Flammability 0: Will not burn. E.g. water Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazards (white): no code