The chemical formula for hydrobromic acid is HBr (aq).
Hydrobromic acid is a strong acid formed by dissolving the diatomic molecule hydrogen bromide (HBr) in water. It is used in organic chemistry synthesis and as a reducing agent. It is also used in the production of various bromides, including those used in pharmaceuticals, dyes, and photography. In its gaseous state, it is a colorless gas with an irritating odor.