Used as a stable isotope-labeled internal standard in analytical chemistry, particularly in gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS) for the accurate quantification of 2,4,6-trichloroanisole (TCA) in environmental and food samples. Its deuterated structure allows differentiation from non-labeled TCA, enabling precise detection and measurement even at trace levels. Commonly applied in wine and beverage industries to monitor cork taint, as TCA is responsible for musty off-flavors. Also utilized in environmental testing to study microbial degradation of chlorinated compounds and to validate analytical methods due to its high chemical stability and distinct mass signature.