Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamide or sulfonate ester linkages. It is especially useful in the development of bioactive molecules where the dichlorophenyl moiety contributes to enhanced lipophilicity and metabolic stability. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies and in the preparation of enzyme inhibitors.