Metformin-HCl, 100µg/ml in Acetonitrile, 5ml

n-Undecane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1120-21-4

Method 1640 Tuning Standard

Bis(2-Ethylhexyl)phthalate, 1mg/ml in MeOH, 1ml