Calcium Pyrophosphate
Title: Calcium Pyrophosphate
CAS Registry Number: 35405-51-7
CAS Name: Calcium diphosphate
Molecular Formula: Ca2O7P2
Molecular Weight: 254.10
Percent Composition: Ca 31.55%, O 44.08%, P 24.38%
Line Formula: Ca2P2O7
Literature References: Prepn by ignition of CaHPO4: St. Pierre, J. Am. Chem. Soc. 77, 2197 (1955).
Properties: Polymorphous crystals or powder. d 3.09. mp 1353°. Practically insol in water. Sol in dil HCl or HNO3.
Melting point: mp 1353°
Density: d 3.09
Use: Abrasive; fertilizer; feed supplement; in dentifrices, ceramic ware, china, glass, phosphors.

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