6PPD-quinone, 10mg

n-Hydrocarbon Mix C8 - C40, 2000µg/ml in MeCl2 : CS2 [3:1], 1ml

(1R,2R,5S,6S)-1,2,5,6-Tetrabromocyclooctane, 1.2ml x 50ug/ml , toluene

PCB No. 156, 100µg/ml in Isooctane, 1ml