4.0 M Potassium phosphate dibasic

200 mL bottle of 4.0 M Potassium phosphate dibasic Optimize Reagent.
Synonyms: Dipotassium hydrogenphosphate or Dipotassium phosphate or sec.-Potassium phosphate or di-Potassium hydrogen phosphate anhydrous
K2HPO4
HK2O4P
Mr 174.18
CAS Number [7758-11-4]
EC Number 231-834-5
Merck 14, 7658
MDL Number MFCD00011383
PubChem Substance ID 24881849
Purity > 99.0%
pKa1 = 2.15 at 25 degrees Celsius
pka2 = 6.82 at 25 degrees Celsius
pka3 = 12.38 at 25 degrees Celsius
Measured pH Range: 9.5 - 9.8 at 25 degrees Celsius
Measured Conductivity Range: 126.9 - 154.8 mS/cm at 25 degrees Celsius
Measured Refractive Index Range: 1.40735 - 1.40877 at 20 degrees Celsius
Total Impurities: Insoluble matter passes filter test
Al <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%