Used primarily as a key intermediate in the synthesis of pharmaceuticals and agrochemicals. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamide and sulfonate ester derivatives. Commonly employed in the development of bioactive molecules, including antifungal, antibacterial, and anticancer agents. Also utilized in materials science for modifying polymer properties or introducing biphenyl motifs into functional materials. Its aromatic structure enhances stability and influences electronic characteristics in organic electronic applications.