Calcium phosphate (Ca2P2O7)-Powder

Characteristic

Calcium pyrophosphate (Ca₂P₂O₇) is a chemical compound, an insoluble calcium salt containing the pyrophosphate anion. There are a number of forms reported: an anhydrous form, a dihydrate, Ca₂P₂O₇·2H₂O and a tetrahydrate, Ca₂P₂O₇·4H₂O. Deposition of dihydrate crystals 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.

Chemical formula:Ca₂P₂O₇

Molar mass: 254.053 g/mol

Appearance: White powder

Density: 3.09 g/cm³

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

Application

Calcium phosphate is used in the production of phosphoric acid and fertilizers. It is used in baking as the acid in a leavening agent. It is also used in cheese products. This compound has also been used in gene transfection of cells. It is also being used in the development of contrast agents.