Thulium(III) bromide is a crystalline compound of one thulium atom and three bromine atoms.
[5] The salt is a white powder at room temperature.
[1] It is hygroscopic.
[6] Thulium(III) bromide is used as a reagent for the complexation of lanthanide bromides with aluminium bromide, and as a reactant for preparing alkali metal thulium bromides.
[2] It is also used to create discharge lamps that are free of mercury.