Used as a deuterated reagent in organic synthesis and pharmaceutical research, particularly in the development and analysis of deuterium-labeled compounds. Its primary application lies in NMR spectroscopy, where it serves as a chemical shift reference or as a building block for creating isotopically labeled molecules to study reaction mechanisms, metabolic pathways, and drug stability. Due to the presence of deuterium atoms, it enhances the sensitivity and accuracy of spectroscopic detection in mechanistic studies. It is also employed in the preparation of deuterated ligands and catalysts for kinetic isotope effect investigations.