Used primarily as an intermediate in organic synthesis, especially in the pharmaceutical industry for constructing sulfonamide-based drugs. Its sulfonyl chloride group readily reacts with amines to form sulfonamides, which are key structural motifs in many bioactive molecules, including antibiotics and antidiabetics. Also employed in the development of agrochemicals and functional materials where controlled reactivity and stability are required. Its aromatic and branched alkyl structure enhances lipophilicity, making it useful in modifying drug candidates for improved membrane permeability.