N-Nitrosodimethylamine, 1g

Dicrotophos, 100 µg/ml, Methanol, 1ml

1,1,1,3,10,11-Hexachloroundecane,100 µg/mL,acetone,1mL

1,2,7,8-Tetrachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene