Used as a key intermediate in the synthesis of various pharmaceuticals, particularly in the development of compounds with potential therapeutic applications. Its sulfonyl chloride group makes it a valuable reagent for introducing sulfonamide functionalities into molecules, which are often found in drugs targeting bacterial infections, cancer, and other diseases. Additionally, it serves as a building block in organic chemistry research for creating complex heterocyclic compounds. Its bromine substituent allows for further functionalization through cross-coupling reactions, enabling the creation of diverse chemical structures.