HYDROFLUOSILICIC ACID
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RXSOL-19-3791-025
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HYDROFLUOSILICIC ACID is an inorganic compound with the chemical formula H2SiF6. Aqueous solutions of Hydrofluosilicic acid consist of salts of the cation and hexafluoro silicate anion.
Note
Hydrofluosilicic acid is a by-product of the process where phosphoric rock is treated with sulfuric acid to produce fertilizer.
The resulting hydrogen fluoride and silicon tetrafluoride gases are captured and scrubbed with water to form the acid.
Properties and Composition
Chemical Formula: H₂SiF₆
Appearance: A colorless to pale, straw-colored liquid
Odor: A sharp, irritating, or pungent odor
Corrosivity: Highly corrosive to metals, glass, and living tissues
Composition in Water: In aqueous solution, it exists as a mixture, with the hexafluorosilicate anion (SiF₆²⁻) being a prominent species.
Industrial Uses
Water Fluoridation: Its most common use is to add fluoride to drinking water to help prevent dental caries (cavities).
Manufacturing: It's used to make aluminum fluoride and cryolite.
Materials Science: It acts as a hardener for cement and ceramics and is used in wood preservation.
Electronics: Used in the production of silicon chips and solar panels.
Organic Synthesis: It can be a reagent for cleaving Si-O bonds in organic chemistry.
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