CALCIUM PYROPHOSPHATE

CALCIUM PYROPHOSPHATE Basic information
Product Name:CALCIUM PYROPHOSPHATE
Synonyms:CALCIUM PHOSPHATE (PYRO);CALCIUM PYROPHOSPHATE;CALCIUM DIPHOSPHATE;CPP;DICALCIUM PYROPHOSPHATE;calciumphosphate(ca2p2o7);calciumpyrophosphate(ca2p2o7);Diphosphoricacid,calciumsalt
CAS:7790-76-3
MF:Ca2O7P2
MW:254.1
EINECS:232-221-5
Product Categories:20: Ca;and Other Ceramics;Biocompatible Ceramics;Biomaterials;Nanomaterials;Nanoparticles: Oxides;Calcium;Calcium Salts;Chemical Synthesis;Inorganic Salts;Materials Science;Metal and Ceramic Science;Nanopowders and Nanoparticle Dispersions;Nitrides;Inorganics;metal phosphate compound;Salts;Synthetic Reagents
Mol File:7790-76-3.mol
CALCIUM PYROPHOSPHATE Structure
CALCIUM PYROPHOSPHATE Chemical Properties
Melting point 1230 °C
density 3.09 g/mL at 25 °C(lit.)
solubility H2O: insoluble(lit.)
form Powder
color White
Specific Gravity3.09
Odorat 100.00?%. odorless
Water Solubility Soluble in hydrochloric acid and nitric acid. Insoluble in water.
LogP-3.420 (est)
CAS DataBase Reference7790-76-3(CAS DataBase Reference)
EPA Substance Registry SystemDiphosphoric acid, calcium salt (1:2) (7790-76-3)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36
WGK Germany 3
TSCA Yes
HS Code 28353100
Hazardous Substances Data7790-76-3(Hazardous Substances Data)
MSDS Information
ProviderLanguage
ACROS English
SigmaAldrich English
ALFA English
CALCIUM PYROPHOSPHATE Usage And Synthesis
DescriptionCalcium pyrophosphate has the molecular formula of Ca2P2O7 and the molecular weight of 254.1378 g/mol. It has the CAS number of 7790-76-3. It may be prepared by the solid-state reaction of the dibasic orthophosphate, or alternately by the precipitation of a soluble Ca salt with aqueous pyrophosphoric acid:
2CaHPO4 + heat ? Ca2P2O7 +H2O
CaCl2 (aq) +H4P2O7 (aq) ? Ca2P2O7 (solid) + 2HCl (aq)
The solid-state reaction produces an amorphous crystal at 240–500°C. b-Ca2P2O7 forms >750°C and a-Ca2P2O7 forms in the temperature range of 1140 to 1350°C. The free energy of formation, △Gf=-3132 kcal/mol.
The product of the aqueous method is the dihydrate, Ca2P2O7·2H2O. It is a white powder and has the CAS number of 7790-76-3. It is insoluble in water but soluble in dilute acids. The anhydrate decomposes at 1353°C to form a metaphosphate:
Ca2P2O7 + heat ? Ca(PO3)2 + CaO
Calcium pyrophosphate is dimorphic. The phase transformation and sintering behaviors of Ca2P2O7 with different phase composition has been investigated by using X-ray powder diffraction (XRD), dilatometery and SEM techniques. It was found that although α-Ca2P2O7 (high-temperature form) could be maintained during its cooling process, it was metastable and retransformed into β-Ca2P2O7 (low-temperature form) at about 950 °C during its reheating process.





Chemical Propertieswhite powder
UsesCalcium Pyrophosphate is a nutrient and dietary supplement that exists as a white odorless powder, insoluble in water. it is used in dental impression materials and as a buffer.
UsesCalcium 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.
DefinitionChEBI: Calcium diphosphate is a calcium phosphate. It contains a diphosphate(4-).
Flammability and ExplosibilityNonflammable
CALCIUM PYROPHOSPHATE Preparation Products And Raw materials
GLY-PHE P-NITROANILIDE Radium Pyrophosphate Ammonium phosphate dibasic Calcium phosphate monobasic BARIUM PYROPHOSPHATE Barium carbonate Calcium hydroxyphosphate Beryllium Pyrophosphate distrontium diphosphate STRONTIUM METAPHOSPHATE Sodium Monofluorophosphate calcium bicarbonate CALCIUM PYROPHOSPHATE Pyrophosphoric acid Calcium phosphate Calcium Calcium pyrophosphate dihydrate

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