Used as a deuterated internal standard in analytical chemistry, particularly in mass spectrometry and NMR spectroscopy, to accurately quantify and identify compounds by providing a stable isotopic reference. Its deuterated structure enhances detection specificity and reduces background interference in complex mixtures. Commonly applied in environmental testing, pharmaceutical analysis, and metabolic studies where precise tracking of amine-containing compounds is required. Also serves as a labeled reagent in mechanistic studies to trace reaction pathways involving amine functional groups.