Used primarily as a reagent in organic synthesis, this compound is valuable for introducing sulfonyl groups into molecules. It is commonly employed in the preparation of sulfonamides, which are important in pharmaceutical applications due to their antibacterial and antifungal properties. Additionally, it serves as a key intermediate in the synthesis of dyes, agrochemicals, and other specialty chemicals. Its reactivity with amines and alcohols makes it useful in modifying polymers and creating functionalized materials.