Used as a stable isotope-labeled internal standard in mass spectrometry and gas chromatography for the detection and quantification of halogenated organic compounds. Its deuterated structure allows for accurate tracking and differentiation from non-labeled analogs in environmental and biological samples. Commonly applied in analytical methods to study disinfection byproducts, pesticide metabolites, and chlorinated contaminants in water and soil. The compound’s chemical similarity to non-deuterated 2,3-dichloro-1-propanol ensures comparable retention and reaction behavior, improving measurement precision and method validation.