Used as an intermediate in the synthesis of agricultural chemicals and pharmaceuticals. Its sulfonyl chloride group allows it to participate in sulfa drug formation, particularly in herbicides and fungicides. Commonly employed in the preparation of sulfonamide derivatives through reactions with amines. Also utilized in organic synthesis for constructing complex molecules where a chlorinated aromatic scaffold is needed. Its ester functionality enables further transformation, such as hydrolysis or reduction, to modify the core structure for specific activity in crop protection agents.