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 forming sulfonamides and sulfonate esters—common motifs in drug design. It plays a role in the development of bioactive molecules, including antifungal and anti-inflammatory agents. Also employed in materials science for constructing functionalized biphenyl derivatives used in liquid crystals and organic semiconductors.