Used as a disinfectant in swimming pools and industrial water systems, especially when combined with chlorine. It provides a more stable and longer-lasting sanitizing effect compared to chlorine alone, particularly in warm water environments like spas and hot tubs.

Commonly used in drilling fluids for oil and gas wells due to its high density and ability to stabilize wellbore pressure. It helps prevent blowouts and allows safe extraction in high-pressure formations.

Serves as a source of bromide ions in chemical synthesis, particularly in the preparation of other bromine-containing compounds, including organic synthesis via nucleophilic substitution reactions. Also used in some pharmaceuticals as an anticonvulsant and sedative, though largely replaced by newer drugs due to cumulative side effects.

Found in photographic processes and certain types of analytical chemistry for bromide ion supply. Its ability to form insoluble salts with silver makes it useful in qualitative inorganic analysis. Additionally, used in luminescent materials and as a precursor for other bromide-containing chemicals.