| Calcium pyrophosphate | |
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Calcium diphosphate |
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Other names
Diphosphoric acid, calcium salt (1:2) |
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| Identifiers | |
| CAS number | 7790-76-3 |
| PubChem | 24632 |
| ChemSpider | 23034 |
| UNII | X69NU20D19 |
| MeSH | Calcium+pyrophosphate |
| ChEBI | CHEBI:32598 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | Ca2O7P2 |
| Molar mass | 254.053 g/mol |
| Density | 3.09 g/cm3 |
| Melting point |
1230 °C |
| Solubility in water | insoluble |
| Hazards | |
| EU Index | Not listed |
| NFPA 704 |
0
2
0
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| Flash point | Non-flammable |
| Related compounds | |
| Other anions | Calcium phosphate |
| Other cations | Magnesium pyrophosphate Sodium pyrophosphate |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Calcium pyrophosphate (Ca2O7P2) is a chemical compound that can be formed by the reaction of pyrophosphoric acid and a calcium base or by strongly heating calcium phosphate or calcium ammonium phosphate.
It is commonly used as a mild abrasive agent in toothpastes.
Deposition of CPPD in articular joints causes an arthritis condition called pseudogout.
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