Analytes - dichlorodifluoromethane
dichlorodifluoromethane (Freon 12, Refrigerant 12, Halon 122): CAS No. 75-71-8, CCl2F2, molecular weight 120.91, boiling point –29.8°C, density 1.49gm/mL, vapor pressure 4850mm Hg at 25°C, non flammable, slightly water soluble is a colorless gas used as a leak-detecting agent; freezing of foods by direct contact, formerly used in chilling of cocktail glasses, refrigerant in air conditioners, plastics, blowing agent, solvent. It is most frequently measured in water, air, oil and soil to comply with environmental regulations. Due to its volatility, it is most often measured using GC/PID, ECD, ELCD and GC/MS methods specified by regulatory agencies like the U.S. EPA.