Used as a key intermediate in the synthesis of sulfa drugs, particularly in the production of carbonic anhydrase inhibitors. Its reactivity allows for the introduction of sulfonyl groups into various pharmacophores, enhancing the biological activity of resulting compounds. Commonly employed in medicinal chemistry for developing anti-glaucoma agents and diuretics. Also utilized in the preparation of functionalized polymers and as a derivatizing agent in analytical chemistry for detecting compounds containing amino or hydroxyl groups.