Potassium phosphate monobasic has been used in the preparation of phosphate buffer and phosphate buffered saline (PBS).
It has also been used in the preparation of PEG1000 (poly ethylene glycol)/potassium phosphate aqueous two-phase systems.
grade | ACS reagent |
assay | ≥99.0% |
impurities | ≤0.01% Insoluble matter |
loss | ≤0.2% loss on drying, 105°C |
pH | 4.1-4.5 (25 °C, 5%) |
pKa (25 °C) | (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) |
mp | 252.6 °C (lit.) |
density | 2.338 g/mL at 25 °C (lit.) |
anion traces | chloride (Cl–): ≤0.001% |
sulfate (SO42-): ≤0.003% | |
cation traces | Fe: ≤0.002% |
Na: ≤0.005% | |
heavy metals: ≤0.001% (by ICP-OES) | |
SMILES string | [K+].OP(O)([O-])=O |
InChI | 1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1 |
InChI key | GNSKLFRGEWLPPA-UHFFFAOYSA-M |