Used primarily as an intermediate in organic synthesis, especially in the pharmaceutical industry. It plays a key role in the preparation of active pharmaceutical ingredients (APIs) by enabling the introduction of benzoyl and chloromethyl functional groups into larger molecules. Its high reactivity makes it valuable for constructing complex aromatic compounds, including antihistamines, anti-inflammatory agents, and other therapeutic agents. Also employed in the synthesis of agrochemicals and specialty polymers due to its ability to form amide and ester linkages under controlled conditions. Requires careful handling because of its moisture sensitivity and potential to react vigorously with nucleophiles.