2,4,5,6-Tetrachloro-m-xylene, 100µg/ml in MeOH, 5ml

2,2-Bis(4-hydroxy-13C6-phenyl)propane, 1.2ml x 50ug/ml, methanol

Metoprolol tartrate, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 56392-17-7

n-Butyraldehyde