Used as a chiral building block in the synthesis of biologically active compounds, particularly in pharmaceuticals where stereochemistry plays a critical role in drug efficacy. Its sulfone and amine functionalities make it suitable for use in asymmetric synthesis and as an intermediate in the development of enzyme inhibitors. Commonly employed in the preparation of serotonin and norepinephrine reuptake inhibitors, especially in the research and development of antidepressant and anxiolytic agents. The hydrochloride salt enhances stability and solubility, facilitating handling in industrial and laboratory settings.