Paraquat dichloride, 100 µg/ml, Water, 1ml

2,3,3',4,4',5,5',6-Octabromo[13C12]diphenyl ether, 1.2ml x 50ug/ml, toluene

Foramsulfuron, 100µg/ml in Acetonitrile, 5ml

N-Nitroso-N-methylethylamine