Method 532 Surrogate Standard

4-Hydroxyisophthalic acid (4-Hydroxybenzene-1,3-dicarboxylic acid), 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 636-46-4

Metoprolol tartrate, neat, Solvent-neat, Unit 250mg, # of units-1, Cas.no. 56392-17-7

4-Chloro-3-methylphenol, 100µg/ml in MeOH, 1ml