Sigma-Aldrich
Potassium Phosphate Monobasic ACS Reagent 99.0% 2.5 kg, case/4
- Part Number:
- MIL-P0662-4X25KG
- Lead Time:
- 7-14 days
- Shipping:
- FREE SHIPPING on most orders over $50*
- Quantity:
- 4
- Size:
- 2.5 kg
- Style:
- chemical
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Description
Potassium Phosphate Monobasic ACS Reagent ≥99.0% 2.5 Kg Case/4
Synonym: Monopotassium phosphate, Potassium dihydrogen phosphate, prim.-Potassium phosphate
- CAS Number 7778-77-0
- Linear Formula KH2PO4
- Molecular Weight 136.09
- EC Number 231-913-4
- MDL number MFCD00011401
- PubChem Substance ID 329820048
- NACRES NA.21
| Quality Level | 100 |
| 200 | |
| 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 |
General description
Potassium phosphate monobasic (monopotassium orthophosphate) is a water soluble inorganic salt. Its standard enthalpy of formation has been reported to be -376.1kcalmol-1. It acts a starting material in the synthesis of potassium metaphosphate.
Application
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 (ATPS).
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Warnings
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