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, including air, water, and soil. Commonly applied in monitoring industrial emissions and contaminated sites due to its presence as a solvent and chemical intermediate. Also used in quality control during the production of vinyl chloride and other chlorinated compounds. Helps maintain compliance with environmental and occupational safety regulations by providing reliable measurement benchmarks.