12 components: 1000ug/ml each of Chloroform [CAS:67-66-3] ; cis-1,2-Dichloroethene [CAS:156-59-2] ; 1,2-Dichloroethane [CAS:107-06-2] ; 1,1,1,2-Tetrachloroethane [CAS:630-20-6] ; Tetrachloroethene [CAS:127-18-4] ; Tetrachloromethane [CAS:56-23-5] ; trans-1,2-Dichloroethene [CAS:156-60-5] ; Trichloroethene [CAS:79-01-6] ; 1,1,2,2-Tetrachloroethane [CAS:79-34-5] ; 1,1,2-Trichloroethane [CAS:79-00-5] ; 1,1-Dichloroethane [CAS:75-34-3] ; 1,1-Dichloroethene [CAS:75-35-4] in Methanol