Aromatic Hydrocarbons Mixture 16 components (EPA 502)_x000D_ 200ug/ml each of Benzene [CAS:71-43-2] ; n-Butylbenzene [CAS:104-51-8] ; sec-Butylbenzene [CAS:135-98-8] ; tert-Butylbenzene [CAS:98-06-6] ; Ethylbenzene [CAS:100-41-4] ; Isopropylbenzene [CAS:98-82-8] ; 4-Isopropyltoluene [CAS:99-87-6] ; Naphthalene [CAS:91-20-3] ; n-Propylbenzene [CAS:103-65-1] ; Styrene [CAS:100-42-5] ; Toluene [CAS:108-88-3] ; 1,2,4-Trimethylbenzene [CAS:95-63-6] ; 1,3,5-Trimethylbenzene [CAS:108-67-8] ; m-Xylene [