Used as a reference standard in environmental testing laboratories to calibrate analytical instruments such as gas chromatographs and mass spectrometers. It helps in the accurate detection and quantification of 1,2,3-trichloropropane in water, soil, and air samples, especially in monitoring groundwater contamination. Commonly applied in regulatory compliance testing due to its historical use in industrial processes and its presence as a byproduct in pesticide manufacturing. Ensures reliable measurement of trace levels for risk assessment and remediation efforts.