Used as an intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and fine chemicals. It plays a role in the development of antihistamines and tricyclic antidepressants due to its ability to form complex amine structures. Also employed in the synthesis of dyes and functionalized amines through nucleophilic addition and reduction reactions. Its hydrochloride salt form enhances stability and solubility, making it suitable for use in aqueous or polar environments during reaction processes.