SV Calibration mix #4 contains carbazole (86-74-8); dibenzofuran (132-64-9); diethyl phthalate (84-66-2); 2,4-dinitrotoluene (121-14-2); 2,6-dinitrotoluene (606-20-2); hexachlorobenzene (118-74-1); hexachlorobutadiene (87-68-3); hexachlorocyclopentadiene (77-47-4); hexachloroethane (67-72-1); isophorone (78-59-1); 2-methylnaphthalene (91-57-6); nitrobenzene (98-95-3); 1,2,4-trichlorobenzene (120-82-1).