2,2',4,4'-Tetrahydroxybenzophenone, 500mg

1,8-Dimethylphenanthrene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 7372-87-4

Endosulfan-sulfate, 100 µg/ml, Cyclohexane, 1ml

EPA Method 507 Surrogate Standard