Used as a reference standard in analytical laboratories for the calibration of instruments such as gas chromatographs (GC) and mass spectrometers (MS). It ensures accurate detection and quantification of 1,1,2,2-tetrachloroethane in environmental samples, particularly in water, soil, and air testing. Commonly applied in environmental monitoring to assess contamination from industrial processes or solvent degradation. Also used in quality control procedures for regulatory compliance in occupational health and safety testing.