Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of antipsychotic and antidepressant drugs. Its hydrazine and piperidine functional groups enable coupling reactions to form heterocyclic structures common in central nervous system agents. Also employed in the preparation of selective enzyme inhibitors and receptor ligands for research purposes. The dihydrochloride salt form enhances stability and solubility, making it suitable for use in aqueous reaction conditions.