Fluosilicic Acid is a liquid compound with a sour and pungent odor. This colorless chemical has a density of 1.22 grams per cubic centimeters. It has a chemical formula of F6H2Si with an average molecular mass of 144.091 grams per mol. It can be used in applications such as lead refining, as reagent in organic synthesis, rust removing, and others. Fluosilicic Acid is corrosive in nature and cause severe skin burns and eye damage on direct contact.