Potassium phosphate monobasic - 04243
Code: 04243
Potassium phosphate monobasic
Meets analytical specification of NF, Ph. Eur., E340, Anhydrous, 98-100.5% (calc. to the dried substance)
Monopotassium phosphate; Potassium dihydrogen phosphate; prim.-Potassium phosphate
meets analytical specification of Ph. Eur., NF, E340, anhydrous, 98-100.5% (calc. to the dried substance)
CAS Number: 7778-77-0
Linear Formula: KH2PO4
Molar Mass: 136.09 g/mol
EC Number: 231-913-4
MDL Number: MFCD00011401
| Property |
Value |
| Assay (calculated to the dried substance) |
98.0 - 100.5 % |
| Loss on drying (130°C) |
max. 1.0 % |
| Loss on drying (105°C, 4 h) |
max. 1.0 % |
| Water insoluble matter |
max. 0.2 % |
| PH (5 %, 20°C) |
4.2 - 4.5 |
| Arsenic (As) |
max. 1 ppm |
| Cadmium (Cd) |
max. 1 ppm |
| Copper (Cu) |
max. 0.002 % |
| Iron (Fe) |
max. 10 ppm |
| Mercury (Hg) |
max. 1 ppm |
| Sodium (Na) |
max. 0.1 % |
| Lead (Pb) |
max. 1 ppm |
| Zinc (Zn) |
max. 0.002 % |
| Heavy metals (as Pb) |
max. 10 ppm |
| Chloride (Cl) |
max. 10 ppm |
| Fluoride (F) |
max. 10 ppm |
| Sulfate (SO4) |
max. 200 ppm |
| KMnO4 reducing matter (as O) |
max. 0.04 % |
| Appearance of the solution |
complying |
| Residual solvents |
complying |
| Property |
Value |
| PKa (25 °C) |
(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) |
| Freezing point |
253 °C |
| Density |
2.34 g/cm3 |
