Widely used in organic synthesis as a sulfonylating agent, particularly in the preparation of sulfonamides. It reacts readily with amines to form sulfonamide derivatives, which are key intermediates in pharmaceuticals and agrochemicals. Commonly employed in research laboratories for the protection of functional groups and in the development of dyes and medicinal compounds due to its selective reactivity. Its electron-withdrawing substituents enhance its stability and reactivity in various condensation reactions.