Potassium Fluorosilicate, CAS 16871-90-2, (also known as potassium hexafluorosilicate, potassium fluosilicate or potassium silicofluoride) has the formula KSiF6. It is a toxic chemical, like all salts of fluorosilicic acid. Potassium fluorosilicate finds use as an additive in metal finishing, ore refining, and a variety of other specialized applications.
