(S)-1,2,3,4-Tetrahydro-1-naphthylamine is primarily used as a chiral building block in the synthesis of pharmaceuticals. Its structure makes it valuable for creating enantiomerically pure compounds, which are crucial in drug development to ensure specificity and reduce side effects. It is often employed in the production of active pharmaceutical ingredients (APIs) for treatments targeting neurological disorders, cardiovascular diseases, and other therapeutic areas. Additionally, it serves as a key intermediate in the synthesis of complex organic molecules, particularly in asymmetric synthesis, where its chiral center helps control the stereochemistry of the final product. Its applications also extend to agrochemical research, where it aids in the development of more effective and selective pesticides or herbicides.