Used as a stable isotope-labeled compound in research and analytical chemistry, particularly in nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry. It serves as an internal standard for the quantification and identification of aromatic compounds in complex mixtures. Its deuterated structure allows for precise tracking and analysis of chemical reactions and metabolic pathways, making it valuable in pharmaceutical development, environmental studies, and organic synthesis research. Additionally, it aids in the study of molecular dynamics and structural properties of aromatic systems due to its isotopic labeling.