pH 4.0 Standard @ 25°C

3-Phenyl-1-propanol, 1000mg

2-Methyl-9,10-anthraquinone, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 84-54-8

2,3,5,6-Tetrachlorophenol, 100µg/ml in MeOH, 5ml