Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) requiring stereochemical control. Its primary application lies in the production of enantiomerically pure drugs, where the (S)-configuration plays a critical role in biological activity. Commonly employed in the preparation of selective serotonin reuptake inhibitors (SSRIs) and related central nervous system agents. Also utilized in the manufacture of asymmetric catalysts and fine chemicals for medicinal chemistry research. The dihydrochloride salt form enhances stability and solubility, making it suitable for industrial-scale reactions and purification processes.