Used primarily as an intermediate in the synthesis of pharmaceuticals, particularly in the production of central nervous system stimulants and appetite suppressants. It serves as a chiral building block in asymmetric synthesis, enabling the development of enantiomerically pure drugs. Its hydrochloride salt form enhances stability and solubility, making it suitable for use in controlled laboratory and industrial-scale reactions. Commonly found in research settings for developing compounds with adrenergic activity.