Chlorpyrifos-methyl-desmethyl sodium, 25mg

Methylheneicosanoate C21:0, 10mg/mL in Hexane, 1ml

2,4'-DDE, 10.0 µg/ml, Ethyl acetate, 10ml

n-Alkanes C14-C32 (even + pristane/phytane) 12 Analytes, each 1000 µg/mL in isooctane; units: 1x1mL, 5x1mL, 10x1mL This standard includes all the even n-paraffins + pristane and phytane.