Metformin-d6 HCl, 1000µg/ml in MeOH, 1ml

4-n-Butylbiphenyl, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 37909-95-8

EPA Method 8310 Surrogates, 50µg/ml in MeChl, 1ml

Ferbam