Used as a key reagent in organic synthesis, particularly in transition-metal-catalyzed coupling reactions and sulfination processes. It serves as a source of the 3-bromophenylsulfonyl group, enabling the introduction of sulfone functionalities into target molecules. Widely applied in pharmaceutical and agrochemical research for constructing complex aromatic structures. Also employed in the development of functional materials and as an intermediate in the preparation of bioactive compounds. Its stability and reactivity make it suitable for use in cross-coupling reactions, including palladium-catalyzed transformations.