Used as a deuterated internal standard in mass spectrometry and NMR spectroscopy for the analysis of fatty alcohols and lipid metabolites. Its deuterium labeling allows for precise tracking and quantification in metabolic studies and environmental fate analyses. Commonly applied in pharmaceutical and biochemical research to study absorption, distribution, and degradation pathways of long-chain alcohols. Also utilized in surface chemistry studies where isotopic labeling helps distinguish between endogenous and exogenous compounds in complex mixtures.