Used as a catalyst in organic synthesis, particularly in coupling reactions such as Ullmann-type reactions where carbon-nitrogen or carbon-oxygen bonds are formed. It is also employed in the preparation of other copper-based reagents and complexes used in industrial and laboratory-scale transformations. In materials science, it serves as a precursor for the synthesis of semiconductor materials and optoelectronic devices due to its unique electronic properties. Additionally, cuprous bromide finds use in photographic processes and as a reagent in certain halogenation reactions.