Used primarily as a solvent in nuclear magnetic resonance (NMR) spectroscopy due to its deuterated form, which provides a non-interfering background in the analysis of organic compounds. It serves as a reference standard in chemical research, enabling precise measurements and accurate identification of molecular structures. Its stability and compatibility with various solvents make it valuable in studying reaction mechanisms and molecular dynamics. Additionally, it is employed in the synthesis of specialized chemicals where deuterium labeling is required for tracking or analytical purposes.