Parathion-ethyl, 100 µg/ml, Ethyl acetate, 5ml

EPA Method 533 Isotope Dilution Standard PDS, in MeOH, 1,2ml

N-Methyl-N-nitrosobenzylamine,1000 µg/mL,acetonitrile,1mL,

Heptachlor-endo-epoxide (trans-, isomer A), certified, 10mg