Fluosilicic acid

Fluosilicic Acid (also known as Hydrofluorosilicic acid, Hexafluorosilicic acid, Hydrogen hexafluorosilicate, or Silicofluoric acid) is an inorganic compound with the chemical formula H2SiF6. It is a colorless liquid, often used in water fluoridation, ceramic production, and in the tanning industry.

Chemical Properties

Fluosilicic Acid is a compound of fluorine, silicon, and hydrogen. It is a strong acid, and in its concentrated form, it is corrosive and can cause burns. It is soluble in water and its solutions are colorless. When heated, it decomposes to release toxic fumes of hydrogen fluoride.

Production

Fluosilicic Acid is produced as a byproduct in the manufacture of phosphoric acid. This occurs when phosphate rock, which contains fluorapatite, is treated with sulfuric acid. The resulting gas is then absorbed in water to form fluosilicic acid.

Uses

The primary use of Fluosilicic Acid is in water fluoridation. It is added to public water supplies in many countries to help prevent tooth decay. It is also used in the production of ceramic, glass, and enamel, and in the tanning industry.

Safety

Exposure to Fluosilicic Acid can cause irritation to the skin, eyes, and respiratory tract. Ingestion can lead to severe health effects, including damage to the heart and bones. It is classified as a hazardous substance and should be handled with care.

See Also

• Fluorine
• Silicon
• Hydrogen
• Phosphoric Acid
• Water Fluoridation