Used primarily as an intermediate in organic synthesis, this compound serves in the preparation of pharmaceuticals, agrochemicals, and specialty esters. It acts as a chloromethylating agent, transferring the chloromethyl group to various substrates. Commonly employed in the synthesis of active pharmaceutical ingredients where introduction of a chloromethyl functionality is required. Also utilized in the production of polymers and resins as a modifying agent. Due to its reactivity and lachrymatory properties, it is handled with care in controlled environments.