Sodium Fluorosilicate, CAS 16893-85-9, (also known as sodium hexafluorosilicate, sodium fluosilicate or sodium silicofluoride) has the formula NaSiF6. It is a toxic chemical, like all salts of fluorosilicic acid. Sodium fluorosilicate finds use as an additive in metal finishing, as a fluoridation additive in potable water treatment (when NSF Registered), and ore refining, and a variety of other specialized applications.
