28 components: 1000ug/ml each of Chloroform [CAS:67-66-3] ; 1,2,3-Trichloropropane [CAS:96-18-4] ; Chlorobenzene [CAS:108-90-7] ; Chloromethane [CAS:74-87-3] ; Dichloromethane [CAS:75-09-2] ; 1,2-Dichloroethane [CAS:107-06-2] ; Ethylbenzene [CAS:100-41-4] ; 1,2-Dichlorobenzene [CAS:95-50-1] ; 1,2-Dichloropropane [CAS:78-87-5] ; Hexachloro-1,3-butadiene [CAS:87-68-3] ; 1,3-Dichlorobenzene [CAS:541-73-1] ; 1,4-Dichlorobenzene [CAS:106-46-7] ; 1,1,1-Trichloroethane [CAS:71-55-6] ; Styrene [CAS:100-