Used primarily as an intermediate in the synthesis of pharmaceuticals and fine chemicals. Its reactive acyl chloride group enables it to form amide or ester bonds, making it valuable in constructing complex organic molecules. Commonly employed in the development of active pharmaceutical ingredients (APIs), particularly in the production of anti-inflammatory or central nervous system agents. Also utilized in agrochemical synthesis for creating structurally specific pesticides. Its chlorinated aromatic structure enhances stability and influences biological activity in final products. Handling requires caution due to its moisture sensitivity and potential to cause irritation.