Used as a reference standard in analytical laboratories for the accurate determination of 1,2-dichloroethane in environmental samples such as water, soil, and air. Commonly employed in gas chromatography and mass spectrometry to calibrate instruments and validate test methods. Ensures reliable detection and quantification of 1,2-dichloroethane contamination, especially in industrial hygiene and environmental monitoring programs. Also utilized in quality control procedures for regulatory compliance testing and in research studies involving volatile organic compounds.