13C6-Mefenamic acid, 10mg

1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin , 1.2ml x 50ug/ml, nonane

Hexavalent Chromium (Cr 6+)

Pentachloronitrobenzene, 1000µg/ml in Acetonitrile, 1ml