Used as a reference standard in analytical laboratories for the calibration of instruments such as gas chromatographs (GC) and mass spectrometers (MS). Ensures accurate detection and quantification of 1,2-dichloroethane in environmental samples, industrial emissions, and contaminated water. Commonly applied in air and soil testing to monitor pollution levels and assess compliance with safety regulations. Also used in research settings to study chlorinated hydrocarbon behavior and degradation.