Used as a labeled compound in various research applications, particularly in the field of analytical chemistry and mass spectrometry. It serves as a deuterated internal standard for the quantification of similar aromatic amines in complex mixtures, ensuring accurate and precise measurements. Its application is also relevant in metabolic studies, where it aids in tracing and understanding the pathways and transformations of related compounds. Additionally, it is employed in the development of pharmaceuticals and agrochemicals to study degradation products and metabolites.