Naphthalene-d8

1,1-Dichloro-2,2-bis[4-chloro(13C6)phenyl]ethene, 1.2mL x 100ug/mL, nonane

Metribuzin-desamino-diketo, 100 μg/ml, Acetonitrile, 1ml

2,3,3,4,5,5,6-Heptachlorobiphenyl,-192