Composition: PCB 28 10µg/ml [7012-37-5] PCB 52 10µg/ml [35693-99-3] PCB 101 10µg/ml [37680-73-2] PCB 138 10µg/ml [35065-28-2] PCB 153 10µg/ml [35065-27-1] PCB 180 10µg/ml [35065-29-3]