Widely used in nuclear magnetic resonance (NMR) spectroscopy as a solvent for analyzing organic compounds, providing a deuterium lock for stable magnetic field regulation. It is also employed in the synthesis of deuterated compounds, which are essential in research involving isotopic labeling to study reaction mechanisms and metabolic pathways. Additionally, it plays a role in the production of specialty chemicals and pharmaceuticals where deuterium substitution is required to enhance stability or alter biological activity.