Potassium dihydrogen phosphate
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Monopotassium phosphate (also potassium dihydrogen phosphate, KDP, or monobasic potassium phosphate, MKP) -- KH2PO4 -- is a solu
| IUPAC name[hide] Potassium dihydrogen phosphate | |
| Other names[hide] Potassium phosphate monobasic | |
| CAS number | 7778-77-0 Y |
| PubChem | 516951 |
| ChemSpider | 22914 N |
| UNII | 4J9FJ0HL51 Y |
| RTECS number | TC6615500 |
| Jmol-3D images | Image 1 |
| [show] [K+].[K+].[K+].[O-]P([O-])([O-])=O
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| [show] InChI=1S/3K.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3*+1;/p-3 Y InChI=1/3K.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3*+1;/p-3 | |
| Molecular formula | KH2PO4 |
| Molar mass | 136.086 g/mol |
| Appearance | White powder deliquescent |
| Density | 2.338 g/cm3 |
| Melting point | 252.6 °C |
| Boiling point | 400 °C, dec |
| Solubility in water | 22 g/100 mL (25 °C) |
| Solubility | insoluble in alcohol |
| Acidity (pKa) | 7.2 |
| Basicity (pKb) | 11.9 |
| Crystal structure | tetragonal |
| MSDS | External MSDS |
| EU Index | Not listed |
| NFPA 704 | 010 |
| Flash point | Non-flammable |
| Other cations | Monosodium phosphate Monoammonium phosphate |
| Related compounds | Dipotassium phosphate Tripotassium phosphate |
| N (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
