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Hexafluorosilicic acid is an inorganic compound with the chemical formula It is a colorless liquid rarely encountered undiluted.
F 1436 (OTTO) Fluosilicic acid Cas 16961-83-4 - used in the preparation of sodium fluorosilicate, via neutralization with sodium chloride. It can also undergo neutralization with ammonia to produce ammonium fluoride and silica.