Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. Its sulfonyl chloride functional group allows it to form sulfonamides and sulfonate esters, which are key structural motifs in many biologically active compounds. It is especially valuable in the development of herbicides and fungicides due to the enhanced lipophilicity and stability imparted by the dichloro-substituted biphenyl core. Also employed in medicinal chemistry for constructing drug candidates targeting inflammatory and infectious diseases.