Used primarily as a labeled internal standard in gas chromatography-mass spectrometry (GC-MS) and nuclear magnetic resonance (NMR) spectroscopy due to its deuterated structure. Its isotopic labeling allows for precise tracking and quantification in environmental studies, particularly in the analysis of brominated hydrocarbons and degradation products. Also employed in mechanistic studies to trace reaction pathways involving halogenated compounds, where the deuterium atoms provide clear distinction from non-labeled analogs. Its stability and distinct mass signature make it valuable in metabolic and environmental fate studies.