Tribromide is the anion with the chemical formula Br3−, or salts containing it: Tetrabutylammonium tribromide Tetrabromophosphonium tribromide Pyridinium perbromide Sodium and potassium tribromides can be prepared by reacting NaBr or KBr with aqueous bromine. Br− + Br2 → Br3− Tribromide may also refer to binary chemical compounds containing three bromine atoms: Aluminium tribromide, AlBr3 Antimony tribromide, SbBr3 Arsenic tribromide, AsBr3 Bismuth tribromide, BiBr3 Boron tribromide, BBr3 Chromium tribromide, CrBr3 Erbium tribromide, ErBr3 Europium tribromide, EuBr3 Ferric tribromide, FeBr3 Gallium tribromide, GaBr3 Gold tribromide, AuBr3 or Au2Br6 Indium tribromide, InBr3 Molybdenum tribromide, MoBr3 Nitrogen tribromide, NBr3 Phosphorus tribromide, PBr3 Samarium tribromide, SmBr3 Terbium tribromide, TbBr3 Vanadium tribromide, VBr3 Ytterbium tribromide, YbBr3 Yttrium tribromide, YBr3 Bromine compounds