Used as a key reagent in organic synthesis, particularly for introducing sulfonyl groups into molecules. It plays an important role in the preparation of sulfonamides, which are common motifs in pharmaceuticals and agrochemicals. Its reactivity makes it suitable for modifying amines and alcohols in complex molecule assembly. Also employed in peptide chemistry to protect or activate functional groups. Due to its ability to enhance molecular stability and binding properties, it is valuable in drug development and medicinal chemistry research.