EPA 1620 Standard 4

n-Butyl iso-butyl phthalate (n-Butyl 2-methylpropyl phthalate), neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 17851-53-5

Alachlor, 100 µg/ml, Acetonitrile, 5ml

Nitrofen, 10µg/ml in Cyclohexane, 10ml