Phosphorus heptabromide is an inorganic compound with the chemical formula PBr7.

At normal conditions, it forms red prismatic crystals.

PBr7 can be prepared by the sublimation of a mixture of phosphorus pentabromide and bromine.

[2] The structure of PBr7 consists of a tetrabromophosphonium cation [PBr4]+, paired with a tribromide anion [Br3]−, and the tribromide anion is non-symmetric.

[1] This inorganic compound–related article is a stub.