EPA Method 525 Spike B

17ß-Estradiol, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 50-28-2

Metformin Hydrochloride, 1g

N-Ethyl-N-(2-hydroxyethyl)perfluorooctylsulphonamide,neat,neat,10mg,