Used as an isotopically labeled internal standard in gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS) analyses. It aids in the accurate quantification of hydrocarbons and other organic compounds by providing a reference with similar chemical behavior but a distinct mass signature. Commonly applied in environmental testing, petrochemical analysis, and metabolic studies where precise measurement of aliphatic hydrocarbons is required. Its deuterated form ensures minimal interference from native compounds in the sample, enhancing analytical accuracy and reproducibility.