Potassium phosphate monobasic
SIGALD/04243 - meets analytical specification of Ph. Eur., NF, E340, anhydrous, 98-100.5% (calc. to the dried substance)
Synonym: Monopotassium phosphate; Potassium dihydrogen phosphate; prim.-Potassium phosphate
CAS Number: 7778-77-0
Empirical Formula (Hill Notation): H2KO4P
Molecular Weight: 136.09
EC Number: 231-913-4
MDL Number: MFCD00011401
Linear Formula: KH2PO4
Product Type: Chemical
| anion traces | chloride (Cl-): ≤10 mg/kg |
| fluoride (F-): ≤10 mg/kg | |
| sulfate (SO42-): ≤200 mg/kg | |
| assay | 98-100.5% (calc. to the dried substance) |
| cation traces | As: ≤2 mg/kg |
| Cd: ≤1 mg/kg | |
| Cu: ≤20 mg/kg | |
| Fe: ≤10 mg/kg | |
| Hg: ≤1 mg/kg | |
| Na: ≤1000 mg/kg | |
| Pb: ≤4 mg/kg | |
| Zn: ≤20 mg/kg | |
| density | 2.338 g/mL at 25 °C (lit.) |
| form | crystalline |
| grade | anhydrous |
| impurities | org. volatile impurities, complies (GC) |
| residual solvents, complies | |
| ≤0.001% heavy metals (as Pb) | |
| ≤0.04% KMnO4 red. matter (as O) | |
| ≤0.2% in water insoluble matters | |
| InChI | 1S/K.H3O4P/c;1-5(2,3)4/h; |
| InChI key | GNSKLFRGEWLPPA-UHFFFAOYSA |
| loss | ≤1% loss on drying, 130 °C |
| mp | 252.6 °C (lit.) |
| pH | 4.2-4.5 (20 °C, 5%) |
| pKa (25 °C) | (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) |
| quality | meets analytical specification of Ph. Eur., NF, E340 |
| Quality Level | 200  |
| SMILES string | [K+].OP(O)([O-])=O |
| solubility | alcohol: insoluble |
| H2O: soluble 4.5 parts | |
| suitability | complies for appearance of solution |
| Application: | Potassium phosphate monobasic was used for separating tobacco protein by using aqueous two-phase extraction. |
| Biochem/physiol Actions: | Potassium phosphate monobasic also referred to as monopotassium phosphate or potassium dihydrogen phosphate is a soluble salt of potassium that serves as a buffering agent. It enhances the solubility of calcium and phosphorus in amino acid plus dextrose solutions and hence assists in improving the mineral balance of parenterally fed low birth weight infants. |
| Preparation Note: | Potassium phosphate monobasic dissolves in 4.5 (approx.) parts of water to yield a solution. It is practically insoluble in alcohol. |
| RIDADR | NONH for all modes of transport |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | 98-100.5% (calc. to the dried substance) |
| mp | 252.6 °C (lit.) |
| Density | 2.338 g/mL at 25 °C (lit.) |
| UNSPSC | 12161700 |