Potassium fluoride appears as white powder or crystals with a sharp saline taste. Shipped as a solid or an aqueous solution. Strongly irritates skin, eyes and mucous membranes. Potassium Fluoride is a white, crystalline (sand-like) powder with a sharp, salty taste. It is used in etching glass, as a preservative, and as an insecticide.

Potassium fluoride, represented by the chemical formula KF, is an inorganic compound comprising an alkali metal potassium and monoatomic anion fluoride. It exists in its solid state or aqueous solution form, with the mineral carobbiite being the naturally occurring KF. Potassium fluoride is a fluoride salt having K+ as the counterion. It has a role as a poison. It is a fluoride salt and a potassium salt.