Used as an intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and fine chemicals. Its structure allows for the introduction of phenyl and ester functionalities, making it valuable in the development of active pharmaceutical ingredients (APIs). Commonly employed in the synthesis of central nervous system agents and other biologically active compounds where a phenyl-substituted amino ester moiety is required. The hydrochloride salt form enhances stability and solubility, facilitating handling and reaction in aqueous or polar environments.