Used extensively in nuclear magnetic resonance (NMR) spectroscopy as a deuterated salt or buffer, enabling the study of molecular structures and dynamics without interference from hydrogen signals. It serves as a buffering agent in biochemical and pharmaceutical research, maintaining pH stability in various experiments. In mass spectrometry, it acts as a volatile salt, aiding in the ionization process for accurate molecular analysis. Additionally, it is employed in the synthesis of labeled compounds for metabolic studies, providing insights into biochemical pathways and drug mechanisms.