Used extensively as a solvent in nuclear magnetic resonance (NMR) spectroscopy due to its deuterated form, which eliminates interference from proton signals, allowing for clearer analysis of molecular structures. It is particularly valuable in organic chemistry research for studying reaction mechanisms and molecular dynamics. Additionally, it serves as a reference standard in NMR calibration, ensuring accurate and consistent results in spectroscopic studies. Its application is critical in pharmaceutical development, where precise molecular characterization is essential.