Used as a key reagent in organic synthesis, particularly in the preparation of sulfone and sulfonamide derivatives through transition metal-catalyzed coupling reactions. It serves as a sulfinate source in the synthesis of biologically active molecules, including pharmaceuticals and agrochemicals. Its reactivity allows for the introduction of the 4-bromophenylsulfonyl group under mild conditions, making it valuable in the development of functional materials and intermediates for drug discovery. Also employed in radical reactions for C–S bond formation in heterocyclic systems.