Used as a reference standard in analytical laboratories for the calibration of instruments such as gas chromatographs (GC) and high-performance liquid chromatographs (HPLC). 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 levels in industrial areas or near hazardous waste sites. Also used in quality control processes for chemical manufacturing and in research studies involving chlorinated hydrocarbons.