Used as an intermediate in the synthesis of pharmaceuticals and agrochemicals. It serves in the preparation of certain antihistamines and antidepressants due to its ability to form key structural motifs in active pharmaceutical ingredients. Also employed in the production of specialty organic compounds where chlorinated ketones are required for further functionalization. Its reactivity makes it valuable in carbon-chain extension reactions and heterocyclic synthesis. Handle with care due to its lachrymatory and corrosive properties.