Pholcodine-N'-oxide, neat, Solvent-neat, Unit 2,5mg, # of units-1, Cas.no.

EPA Method 507 - Internal Standard

beta-Estradiol hemihydrate, 100 µg/ml, Methanol,

2,6-Dimethylnaphthalene-d12, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 350820-12-1