Used primarily as a sulfonating agent in organic synthesis, enabling the introduction of fluoromethanesulfonyl groups into molecules. This functionality enhances reactivity and is valuable in pharmaceutical and agrochemical development. It serves as a precursor for fluoromethanesulfonate esters and amides, which are key intermediates in catalysis and medicinal chemistry. Also employed in the preparation of ionic liquids and functional materials due to its ability to form stable, electron-withdrawing groups. Its high reactivity requires careful handling but offers efficiency in constructing complex sulfone-based structures.