Heptachlor-exo-epoxide (cis-, isomer B), certified, 10mg

1,2,3,4,6,7,8-Heptachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

Isofenphos, 100 µg/ml, Toluene, 1ml

EPA Method 515 Herbicide Methyl Esters