Used primarily as an intermediate in organic synthesis, especially in the preparation of sulfonamide derivatives. It serves in the development of pharmaceuticals and agrochemicals due to its ability to introduce sulfonyl and amide functional groups. Its reactivity makes it valuable for constructing complex molecules in medicinal chemistry, including antibiotics and enzyme inhibitors. Also employed in the synthesis of specialty polymers and functional materials where controlled sulfonamide linkages are required. Handling requires caution due to its reactive and potentially corrosive nature.