Metformin hydrochloride, 250mg

EPA Method 548.1 Internal Standard

Isopropylbenzene, 1000µg/ml in Cyclohexane, 1ml

4-Aminobiphenyl-d9, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-5, Cas.no. 344298-96-0