Used primarily as an intermediate in the synthesis of pharmaceuticals, particularly in the development of nicotinic receptor ligands and central nervous system agents. It serves as a building block for alkylating agents and is involved in the preparation of certain antihypertensive and neuroactive compounds. Its reactivity allows for the introduction of pyridine-based moieties into larger molecules, enhancing binding affinity in drug candidates. Also utilized in research settings for modifying bioactive molecules and in the production of specialty chemicals requiring chloroethyl functionalization.