Diethyl ether-D10, a deuterated form of diethyl ether, is primarily used in research and analytical applications where isotopic labeling is necessary. It serves as a solvent in nuclear magnetic resonance (NMR) spectroscopy, particularly for studying molecular structures and dynamics due to its deuterium atoms, which reduce interference in NMR signals. Additionally, it is employed in mass spectrometry as a reference compound or internal standard to enhance the accuracy of isotopic measurements. In chemical synthesis, it can be used as a deuterated reagent to trace reaction mechanisms or pathways. Its application is also found in the study of metabolic processes, where it helps in understanding the behavior of ether-based compounds in biological systems.