EPA Method 525 Internals & Surrogates

17beta-Ethynylestradiol,neat,neat,1mg,

9,9'-Bifluorenylidene, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 746-47-4

D7-Malaoxon, 10.0 µg/ml, Cyclohexane, 1ml