Used primarily as a reactive intermediate in organic synthesis, this compound serves as a versatile alkylating agent. It introduces sulfonyl chloride functional groups into target molecules, enabling the preparation of sulfonamides, sulfonate esters, and other sulfur-containing derivatives. Commonly employed in pharmaceutical research, it facilitates the development of bioactive compounds and drug candidates. Its reactivity allows for efficient conjugation in the synthesis of functionalized polymers and specialty chemicals. Due to its sensitivity to moisture, it is typically handled under anhydrous conditions in controlled environments.