Used as a starting material in the synthesis of isotopically labeled organic compounds for chemical and biochemical research, particularly in studies of metabolism and mechanisms of action in the body. The deuterium atoms enable precise tracking and analysis of substance movement using techniques such as NMR spectroscopy and mass spectrometry. It serves as a labeling agent in organic synthesis, particularly in studies involving isotope effects or tracing reaction pathways. Additionally, it is employed in the pharmaceutical industry to develop drugs and study their efficacy at the molecular level, aiding in the creation of compounds with improved stability and metabolic profiles.