Fluoric acid, also known as hydrofluoric acid or hydrofluoride, is represented by the chemical formula HF, indicating that it is composed of one atom of fluorine and one atom of hydrogen. It is an inorganic acid that is usually a gas or a liquid.
Fluoric acid is used in medicine and in the manufacture of some types of pharmaceuticals. It is a toxic substance and can be lethal when inhaled. It also damages skin upon contact. Fluoric acid is considered a weak acid. It can ionize to form a positive H3O ion and a negative F ion. It has a density of 1.15 grams per milliliter.