4.0 M Potassium phosphate dibasic - 200 ml

- Sterile filtered solution
- Formulated in Type 1+ ultrapure water: 18.2 megaohm-cm resistivity at 25°C, < 5 ppb Total Organic Carbon, bacteria free (<1 Bacteria (CFU/ml)), pyrogen free (<0.03 Endotoxin (EU/ml)), RNase-free (< 0.01 ng/mL) and DNase-free (< 4 pg/µL)

Potassium phosphate dibasic

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
Purity ≥ 99.0%

pKa1 = 2.15 at 25°C
pka2 = 6.82 at 25°C
pka3 = 12.38 at 25°C

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

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%


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