Metoprolol acid, 25mg

(1-Hydroxyethyl)-4-(2-methylpropyl)benzene, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 40150-92-3

4-Hydrazinobenzenesulfonic acid hemihydrate, 250mg

4-Methylbiphenyl, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 644-08-6