Widely used in organic synthesis, particularly as a sulfonylating agent to introduce the 2-bromobenzenesulfonyl group into molecules. It plays a key role in the preparation of sulfonamides, which are important intermediates in pharmaceuticals and agrochemicals. The compound is also employed in the development of dyes and functional materials due to its reactivity with amines and alcohols. Its bromine substituent allows for further functionalization via cross-coupling reactions, making it valuable in multi-step synthesis for drug discovery and materials science.