Used as a reference standard in environmental testing laboratories to calibrate analytical instruments such as gas chromatographs. Helps in the accurate detection and quantification of 1,1-dichloroethylene in air, water, and soil samples. Commonly applied in monitoring industrial emissions and contaminated sites due to its presence as a volatile organic compound. Ensures compliance with environmental regulations by providing reliable measurement benchmarks. Also used in research studies focusing on degradation pathways and exposure assessment of chlorinated hydrocarbons.