VOC Gas Mixture - 6 components according to EPA Method 502 ; 2000ug/ml each of Bromomethane [CAS:74-83-9] ; Chloroethane [CAS:75-00-3] ; Chloromethane [CAS:74-87-3] ; Dichlorodifluoromethane [CAS:75-71-8] ; Fluorotrichloromethane (Trichlorofluoromethane) [CAS:75-69-4] ; Vinylchloride [CAS:75-01-4] in Methanol