Synonyms: Dipotassium hydrogenphosphate or Dipotassium phosphate or sec.-Potassium phosphate or di-Potassium hydrogen phosphate anhydrousK₂HPO₄HK₂O₄PM_r 174.18CAS Number [7758-11-4]EC Number 231-834-5Merck 14,7658MDL Number MFCD00011383PubChem Substance ID 24881849Purity ≥ 99.0%

pKa1 = 2.15 at 25°Cpka2 = 6.82 at 25°Cpka3 = 12.38 at 25°C

Measured pH Range: 9.5 - 9.8 at 25°CMeasured Conductivity Range: 126.9 - 154.8 mS/cm at 25°CMeasured Refractive Index Range: 1.40735 - 1.40877 at 20°C

Total Impurities: Insoluble matter passes filter testAl ≤0.0005%As ≤0.00001%Ba ≤0.0005%Bi ≤0.0005%Ca ≤0.001%Cd ≤0.0005%Cl ≤0.005%Co ≤0.0005%Cr ≤0.0005%Cu ≤0.0005%Fe ≤0.0005%Li ≤0.0005%Mg ≤0.0005%Mn ≤0.0005%Mo ≤0.0005%Na ≤0.5%Ni ≤0.0005%Pb ≤0.0005%SO₄ ≤0.005%Sr ≤0.0005%Zn ≤0.0005%