Used primarily as a chloromethylating agent in organic synthesis, enabling the introduction of chloromethyl groups to various substrates. It serves as a safer alternative to bis(chloromethyl) ether in certain reactions due to lower toxicity and carcinogenic risk. Commonly applied in pharmaceutical manufacturing and agrochemical synthesis where controlled chloromethylation is required. Also utilized in polymer chemistry for modifying resins and cross-linking agents. Its liquid form and reactivity make it suitable for homogeneous reaction conditions in non-aqueous solvents.