Fluorosilicic Acid . SYNONYMS : Hydrofluorosilicic Acid; Hydrosilicofluoric acid; Sand acid; Silicofluoric acid; Fluosilicic acid; Hydrofluorosilicic acid; Hydrofluosilic Acid; Hexafluorosilicic acid; Dihydrogen hexafluorosilicate; Cas no: 16961-83-4"