Tags: Chemical Compound, Chemical Substance.
Hexafluorosilicic acid (systematically named oxonium hexafluorosilanediuide and oxonium hexafluoridosilicate(2−)) is an inorganic compound with the chemical formula (H3O)2SiF6 (also written (H3O)2[SiF6] or SiH6O2F6). It can also be written as H2SiF6 with the hydrogen rather than the oxonium cation. It is commonly used as a source of fluoride for water fluoridation.
