Used primarily as a labeled internal standard in mass spectrometry and nuclear magnetic resonance (NMR) analysis. Its deuterated structure allows for clear differentiation from non-labeled compounds in complex mixtures, enhancing accuracy in quantitative analytical methods. Commonly applied in pharmaceutical research and metabolic studies where precise tracking of chemical pathways is required. The high isotopic purity minimizes interference and improves detection sensitivity. Also employed in the synthesis of deuterated active pharmaceutical ingredients (APIs) to study drug metabolism and stability.