Used primarily as a key intermediate in the synthesis of pharmaceuticals and agrochemicals. Its reactive bromomethyl and sulfonyl chloride functional groups allow for selective derivatization, making it valuable in constructing sulfonamide-based compounds. Commonly employed in the preparation of protease inhibitors and other biologically active molecules. Also utilized in organic synthesis for introducing benzenesulfonyl moieties in peptide chemistry and in the development of labeled compounds for research. Its dual reactivity enables sequential functionalization, useful in multi-step synthetic routes.