Used primarily as an intermediate in organic synthesis, especially in the preparation of pharmaceuticals and fine chemicals. Its reactive acyl chloride group allows it to form esters and amides, making it valuable in constructing complex molecules. Commonly employed in the development of drug candidates where acetylated aromatic scaffolds are needed. Also utilized in the synthesis of polymers and specialty resins due to its ability to link molecular units through ester or amide bond formation. Handle with care due to its moisture sensitivity and potential for exothermic reactions with nucleophiles.