1.5 M Potassium phosphate monobasic

200 mL bottle of 1.5 M Potassium phosphate monobasic Optimize Reagent.
Synonyms: Monopotassium phosphate or Potassium dihydrogen phosphate or prim.-Potassium phosphate
H2KO4P
KH2PO4
Mr 136.09
CAS Number [7778-77-0]
EC Number 231-913-4
Merck 14, 7659
RTECS TC6615500
MDL Number MFCD00011401
PubChem Substance ID 24881812
Purity >99.5%

pKa1 = 2.15 at 25 degrees Celsius
pka2 = 6.82 at 25 degrees Celsius
pka3 = 12.38 at 25 degrees Celsius
Melting point (starting material) 252.6 degrees Celsius (lit)
Measured pH range: 3.8 - 4.3 at 25 degrees Celsius
Measured Conductivity Range: 67.7 - 79.1 mS/cm at 25 degrees Celsius
Measured Refractive Index Range: 1.35356 - 1.35459 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 <0.0005%
Co <0.0005%
Cr <0.0005%
Cu <0.0005%
Fe <0.0005%
Li <0.0005%
Mg <0.0005%
Mn <0.0005%
Mo <0.0005%
N <0.001%
Na <0.005%
Ni <0.0005%
Pb <0.0005%
SO4 <0.003%
Sr <0.0005%
Zn <0.0005%