Used as an intermediate in organic synthesis, particularly in the preparation of sulfonamide-based pharmaceuticals. It serves as a building block for introducing the benzenesulfonamide moiety into larger molecules, which is common in drugs targeting enzymes such as carbonic anhydrases. Its bromomethyl group allows for further functionalization through nucleophilic substitution, making it valuable in the development of protease inhibitors, anticancer agents, and other bioactive compounds. Also employed in the synthesis of labeled compounds for biochemical assays and in the creation of polymer-bound reagents for solid-phase synthesis.