(S)-3-Amino-4-(4-chlorophenyl)butanoic acid hydrochloride is primarily utilized in the field of medicinal chemistry and pharmaceutical research. It serves as a key intermediate in the synthesis of various bioactive compounds, particularly those targeting neurological and psychiatric disorders. This compound is often employed in the development of drugs that modulate the central nervous system, such as GABA analogues, which are used to treat conditions like epilepsy, anxiety, and muscle spasms. Additionally, its structural properties make it valuable in the design of enzyme inhibitors and receptor modulators, contributing to the discovery of new therapeutic agents. Researchers also explore its potential in creating chiral molecules, which are essential for producing enantiomerically pure drugs with enhanced efficacy and reduced side effects.