Used as a key intermediate in pharmaceutical synthesis, particularly in the development of nicotinic receptor ligands and central nervous system agents. Its thiol group allows for conjugation in bioconjugate chemistry, making it useful in the design of targeted drug delivery systems and radiopharmaceuticals. Also employed in the preparation of pyridine-based ligands for catalysis and sensor applications due to its strong metal-coordinating properties. Its hydrochloride form enhances solubility and stability in aqueous reaction environments.