Used as a calibration standard in environmental testing laboratories to detect and quantify trace levels of 1,2,3-trichloropropane in water, soil, and air samples. Commonly employed in gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) analyses to ensure accurate measurement of this toxic contaminant, especially in groundwater monitoring and industrial effluent testing. Helps regulatory and analytical labs maintain compliance with environmental safety standards by providing a reliable reference for instrument calibration and method validation.