Barium hexafluorosilicate is an inorganic chemical compound with the chemical formula BaSiF6.

[3][4][5] As a salt that is poorly soluble in water, barium hexafluorosilicate precipitates from solutions that contain barium ions (e.g. barium chloride as well as hexafluorosilicate ions (e.g. hexafluorosilicic acid).

[6] The compound is used as a chemical reagent in experimental applications.

In various chemical reactions and processes, the compound acts as a source of barium and hexafluorosilicate ions.

[7] It was also used as an insecticide.