Barium bromide is primarily used in the preparation of other barium compounds, which are essential in various industrial processes. It serves as a reagent in chemical synthesis, particularly in the production of phosphors for cathode ray tubes and other luminescent materials. In the field of photography, it acts as a component in photographic emulsions to enhance image quality. Additionally, barium bromide is utilized in the purification of certain metals and in the manufacturing of glass, where it contributes to the optical properties and clarity. Its hygroscopic nature also makes it useful in laboratory settings for drying purposes.