Sulfadimethoxine, 100 µg/ml, Methanol, 1ml

4-Hydroxy-11H-indolo[2,3-f]naphthalene, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 23682-01-1

EPA Method 507 - Internal Standard

n-Hexane