Used as a deuterated solvent in nuclear magnetic resonance (NMR) spectroscopy, it helps in analyzing molecular structures by providing a non-interfering background. It is also employed in organic synthesis as a labeled compound to trace reaction mechanisms and pathways. In pharmaceutical research, it serves as a stable isotope-labeled internal standard for accurate quantification in mass spectrometry. Additionally, it finds application in the study of metabolic processes, where its deuterium atoms allow for detailed tracking of biochemical reactions.