Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of sulfonamide-based drugs with antimicrobial and carbonic anhydrase inhibitory activity. It serves as a building block in organic synthesis for introducing the 3-bromobenzenesulfonyl group, which can enhance binding selectivity in biologically active molecules. Also employed in the preparation of dyes, agrochemicals, and functional materials where sulfonyl groups contribute to stability and electronic properties. Its bromine substituent allows further functionalization via cross-coupling reactions, making it valuable in medicinal chemistry research and drug discovery.