Used as a deuterated solvent in nuclear magnetic resonance (NMR) spectroscopy, enabling the study of molecular structures and dynamics without interference from hydrogen signals. It is particularly valuable in research involving organic compounds, polymers, and biomolecules, where precise isotopic labeling is required. Its stability and non-reactivity make it suitable for high-resolution NMR experiments. Additionally, it serves as a reference standard in analytical chemistry for calibration and method development.