Used extensively as a solvent in nuclear magnetic resonance (NMR) spectroscopy due to its deuterated form, which eliminates interference from hydrogen signals, providing clearer and more accurate spectra. It is particularly valuable in the analysis of organic compounds and complex molecular structures. Additionally, it serves as a reagent in chemical synthesis where deuteration is required, aiding in the study of reaction mechanisms and isotope effects. Its application extends to the pharmaceutical industry for the development and testing of deuterated drugs, enhancing metabolic stability and bioavailability.