Potassium Acid Phthalate, 0.05N (0.05M) (Potassium Hydrogen Phthalate)
Manufacturer: LabChem
Chemical Solution, Potassium Acid Phthalate, 0.05N (0.05M) (Potassium Hydrogen Phthalate), LabChem, Traceable to NIST, APHA 2310 B