Used as a calibration and reference standard in analytical laboratories to accurately measure and quantify ethylene oxide levels in various samples. Essential in quality control and safety testing, especially in the sterilization industry where ethylene oxide is used to disinfect medical devices and equipment. Ensures compliance with regulatory limits for residual ethylene oxide in pharmaceuticals and consumer products. Also employed in environmental monitoring to assess air and surface contamination in industrial settings. Provides consistent and reliable results in gas chromatography and other analytical techniques.