Used primarily as an intermediate in organic synthesis, particularly in the pharmaceutical and agrochemical industries. It serves as a key reagent in the preparation of sulfonamide derivatives, which are important structural motifs in many biologically active compounds. Its reactivity allows for the introduction of sulfonyl groups into target molecules, facilitating the development of drugs with antimicrobial, anti-inflammatory, or antidiabetic properties. Additionally, it is employed in the synthesis of functionalized esters and heterocyclic compounds. Due to its high reactivity and sensitivity to moisture, it is handled under controlled conditions, typically in anhydrous environments.