Used primarily as a reagent in organic synthesis, particularly in bromination reactions where selective introduction of bromine is required. It serves as a source of bromine radicals under controlled conditions, useful in free-radical addition and substitution reactions. Also employed in the preparation of flame retardants and as an intermediate in the synthesis of certain pharmaceuticals and agrochemicals. Historically used in fire extinguishers and as a solvent for waxes and fats, though such applications have declined due to environmental and toxicity concerns.