Used primarily as a chemical intermediate in organic synthesis, particularly in the preparation of psychoactive phenethylamine derivatives. It acts as a sulfonylating agent, enabling the modification of amine groups in various compounds. Commonly found in research settings for the controlled synthesis of substituted amphetamines and hallucinogenic substances, its use is highly regulated due to its role in producing illegal drugs. Also employed in the development of analytical reagents for detecting specific functional groups in complex molecules. Handling requires strict safety and regulatory compliance due to its reactivity and potential misuse.