7-Fluoro-1,2,3,4-tetrahydroisoquinoline hydrochloride is primarily utilized in pharmaceutical research and development. It serves as a key intermediate in the synthesis of various bioactive compounds, particularly those targeting neurological disorders. Its structural framework is often incorporated into molecules designed to interact with receptors in the central nervous system, making it valuable in the creation of potential treatments for conditions like depression, anxiety, and Parkinson's disease. Additionally, it is used in the study of enzyme inhibition and receptor modulation, aiding in the discovery of new therapeutic agents. Its fluorine substitution enhances its metabolic stability and binding affinity, making it a useful component in drug design.