(R)-1-(o-Tolyl)butan-1-amine hydrochloride is primarily used in the field of organic synthesis and pharmaceutical research. It serves as a chiral building block or intermediate in the preparation of more complex molecules, particularly those requiring specific stereochemistry. The compound is often employed in the development of enantioselective catalysts or ligands for asymmetric synthesis, which is crucial in creating drugs with high optical purity. Additionally, it may be utilized in the study of receptor-binding interactions or as a reference standard in analytical chemistry for method development and validation. Its applications are largely confined to research and development settings, where precise control over molecular structure is essential.