Used as a key reagent in organic synthesis, particularly for introducing the pyrrolidine-1-sulfonyl group into molecules. It serves as a sulfonylating agent in the preparation of sulfonamides, which are important in pharmaceutical development due to their biological activity. Commonly applied in medicinal chemistry for modifying peptides and small molecules to enhance stability, solubility, or binding affinity. Also utilized in agrochemical synthesis and as an intermediate in the production of functional materials. Its reactivity allows for efficient coupling under mild conditions, making it valuable in both research and industrial settings.