(S)-1-(Naphthalen-1-yl)propan-1-amine hydrochloride is primarily utilized in the field of medicinal chemistry and pharmaceutical research. It serves as a key intermediate in the synthesis of various biologically active compounds, particularly those targeting the central nervous system. Its structure is often explored for the development of potential therapeutic agents, including antidepressants and anxiolytics, due to its ability to interact with neurotransmitter systems. Additionally, it is used in the study of receptor binding assays to understand the mechanisms of action of certain drugs. Its application extends to the development of chiral compounds, where its enantiomeric purity is crucial for optimizing pharmacological activity. Researchers also employ it in the design of novel ligands for studying protein-ligand interactions, contributing to advancements in drug discovery and development.