Used as a stable isotope-labeled internal standard in gas chromatography-mass spectrometry (GC-MS) for precise quantification and identification of hydrocarbons in complex mixtures. Its deuterated structure provides a distinct mass shift, enabling clear differentiation from non-labeled compounds. Commonly applied in environmental analysis, petrochemical research, and metabolic studies where accurate tracking of hydrocarbon behavior is required. The high degree of deuteration enhances detection sensitivity and reduces background interference, improving analytical accuracy.