Used primarily as a sulfonating agent in organic synthesis, enabling the introduction of sulfonyl groups into various substrates. It is particularly valuable in the preparation of sulfonamides, which are key structural motifs in pharmaceuticals and agrochemicals. Its reactivity allows for efficient coupling with amines under mild conditions, making it useful in the development of active pharmaceutical ingredients (APIs). Additionally, it serves as a building block in the synthesis of functionalized sulfones, which can act as intermediates in the production of dyes, polymers, and specialty chemicals. Its selectivity and stability under controlled conditions enhance its utility in laboratory and industrial settings.