8 components: 2000ug/ml each of Chloroform [CAS:67-66-3] ; Dibromochloromethane [CAS:124-48-1] ; 1,2-Dichloroethane [CAS:107-06-2] ; Tetrachloroethene [CAS:127-18-4] ; Tetrachloromethane [CAS:56-23-5] ; Tribromomethane [CAS:75-25-2] ; Trichloroethene [CAS:79-01-6] ; Bromodichloromethane [CAS:75-27-4] in Methanol