Ammonium Fluorosilicate, CAS 16919-19-0, (also known as ammonium hexafluorosilicate, ammonium fluosilicate or ammonium silicofluoride) has the formula (NH4)2SiF6. It is a toxic chemical, like all salts of fluorosilicic acid. Ammonium fluorosilicate finds use as a catalyst additive in low grade fuel refining, as a disinfectant, and it is useful in etching glass, metal casting, and electroplating. It is also used to help neutralize washing machine water as a laundry sour.
