|Jmol-3D images||Image 1|
|Molar mass||254.053 g/mol|
|Melting point||1,353 °C (2,467 °F; 1,626 K)|
|Solubility in water||insoluble|
|Solubility||soluble in HCl, nitric acids|
|Refractive index (nD)||1.585|
|EU Index||Not listed|
|Other anions||Calcium phosphate|
|Other cations||Magnesium pyrophosphate
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)|
|(what is: / ?)|
Calcium pyrophosphate (Ca2P2O7) 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.
Calcium pyrophosphate crystals deposited in cartilage are responsible for the severe joint pain in cases of calcium pyrophosphate deposition disease (pseudo gout) whose symptoms are similar to those of gout.
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