(S)-3-(1-Aminoethyl)benzoic acid hydrochloride is primarily utilized in the pharmaceutical industry as an intermediate in the synthesis of various active pharmaceutical ingredients (APIs). It plays a crucial role in the production of chiral compounds, particularly in the development of drugs targeting neurological and cardiovascular disorders. Its enantiomeric purity makes it valuable for creating optically active molecules, which are essential for achieving specific therapeutic effects. Additionally, it is employed in research and development for designing and testing new drug candidates with improved efficacy and reduced side effects.