(S)-4-(1-Aminoethyl)benzoic acid is primarily used in the pharmaceutical industry as a chiral building block for the synthesis of various active pharmaceutical ingredients (APIs). Its enantiomeric purity makes it valuable in the development of drugs with specific stereochemical requirements, particularly in the production of enantiomerically pure compounds that exhibit enhanced efficacy and reduced side effects. Additionally, it serves as an intermediate in the synthesis of complex organic molecules, including peptides and other bioactive compounds, where its structural features contribute to the desired pharmacological properties. Its applications extend to research and development, where it is utilized in the study of chiral chemistry and the design of novel therapeutic agents.