pH 11.0 Standard at 25°C

m-Cresol-d8, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-5, Cas.no. 302911-90-6

2,3,4-Trichlorophenol, 100 µg/ml, Methanol, 5ml

Caffeine