Propan-d7-2-amine hydrochloride is used extensively in nuclear magnetic resonance (NMR) spectroscopy as an internal standard, enabling precise analysis of molecular structures. It is particularly valuable in studying organic compounds and biochemical processes due to its deuterium labeling, which minimizes interference in NMR spectra. Also employed in pharmaceutical research for drug development, where it aids in tracking metabolic pathways and understanding drug interactions through isotopic labeling. Its stability and high isotopic purity make it a reliable tool in advanced chemical and biological research.