(S)-3-Aminochromane Hydrochloride is primarily used in pharmaceutical research and development as a chiral building block. It serves as a key intermediate in the synthesis of various bioactive compounds, particularly those targeting neurological and psychiatric disorders. Its chiral nature makes it valuable for creating enantiomerically pure drugs, which can enhance efficacy and reduce side effects. Additionally, it is utilized in the study of serotonin and dopamine receptor modulators, contributing to advancements in treatments for conditions like depression, anxiety, and Parkinson's disease. Researchers also explore its potential in designing novel therapeutic agents due to its structural versatility.