Used as a solvent in NMR spectroscopy, particularly for studying hydrogen-containing compounds, due to its deuterated nature which minimizes interference in hydrogen signal detection. It is also employed in research and development for labeling and tracing in chemical reactions, helping to understand reaction mechanisms and pathways. Additionally, it serves as a reference standard in analytical chemistry for calibrating instruments and ensuring accurate measurements in various scientific studies. Its stability and non-reactive properties make it suitable for use in specialized laboratory applications where precise and controlled environments are required.