Used primarily as a sulfonating agent in organic synthesis, enabling the introduction of the ethenesulfonyl group into various nucleophilic compounds, such as amines and alcohols. This functionality is key in the production of vinyl sulfonamides and vinyl sulfones, which are important intermediates in pharmaceuticals (particularly for antibiotics and antidiabetics) and agrochemicals. Also serves as a reagent in the preparation of vinyl sulfones, useful in polymer chemistry and medicinal research. Its high reactivity makes it valuable for modifying organic molecules in research settings, especially in the development of new bioactive compounds and functional materials.