N-Decane-D22 is primarily used as a deuterated solvent in nuclear magnetic resonance (NMR) spectroscopy. Its application is crucial for studying molecular structures and dynamics, particularly in organic chemistry and biochemistry. The deuterium atoms in N-Decane-D22 reduce interference from hydrogen signals, allowing for clearer and more precise NMR spectra. It is also employed in research involving isotopic labeling to trace chemical reactions and pathways. Additionally, its stability and non-reactivity make it suitable for use in various analytical and experimental setups where a deuterated hydrocarbon is required.