Used as a labeled internal standard in analytical chemistry, particularly in mass spectrometry and nuclear magnetic resonance (NMR) spectroscopy, to ensure accurate quantification of compounds in complex mixtures. Its deuterated form provides a stable reference for detecting and measuring non-deuterated analogs in environmental, pharmaceutical, and biochemical research. Additionally, it aids in studying metabolic pathways and reaction mechanisms due to its isotopic labeling, which allows for precise tracking of molecular transformations.