Benzoic acid-benzyl ester, certified, 0.5g

trans-Permethrin (isomer mix)

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

2,2',3,4,4',5,5'-Heptachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane