USEPA 521MRL QC Standard - Nitrosoamine Mix

Benzo[a]pyrene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 50-32-8

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

Metolachlor OA, 100 µg/ml, Acetonitrile, 1ml