Metoprolol (free base),neat,neat,50mg,

2,3',4,5',6-Pentachlorobiphenyl ,100 µg/mL,isooctane,1mL,

4-n-Octylphenol-di-ethoxylate, 1 µg/ml, Acetone,

2-Methylbenzofuran, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 4265-25-2