| Identification | More | [Name]
CALCIUM PYROPHOSPHATE | [CAS]
7790-76-3 | [Synonyms]
CALCIUM DIPHOSPHATE
CALCIUM PHOSPHATE (PYRO)
CALCIUM PYROPHOSPHATE
CPP
DICALCIUM PYROPHOSPHATE
calciumphosphate(ca2p2o7)
calciumpyrophosphate(ca2p2o7)
Diphosphoricacid,calciumsalt
diphosphoricacid,calciumsalt(1:2)
pyrophosphoricacid,calciumsalt(1:2)
pyrophosphoric acid calcium salt
PYROPHOSPHATE DICALCIUM PRACTICAL*GRADE: ANHYDROUS
CALCIUM PYROPHOSPHATE, 99.9+%
CALCIUM PYROPHOSPHATE, 99.98%
Calciumpyrophosphate(99.95%-Ca)
DICALCIUMPYROPHOSPHATEANHYDROUS
DICALCIUMDIPHOSPHATE
CALCIUM PYROPHOSPHATE: (99.95% CA), (PHOSPHOR GRADE)
Calcium phosphate (pyro), 96% min
Calcium phosphate, amorphous | [EINECS(EC#)]
232-221-5 | [Molecular Formula]
Ca2O7P2 | [MDL Number]
MFCD00015983 | [Molecular Weight]
254.1 | [MOL File]
7790-76-3.mol |
| Chemical Properties | Back Directory | [Appearance]
white powder | [Melting point ]
1230 °C | [density ]
3.09 g/mL at 25 °C(lit.)
| [solubility ]
H2O: insoluble(lit.) | [form ]
Powder | [color ]
White | [Specific Gravity]
3.09 | [Odor]
at 100.00?%. odorless | [Water Solubility ]
Soluble in hydrochloric acid and nitric acid. Insoluble in water. | [LogP]
-3.420 (est) | [Uses]
Calcium 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. | [CAS DataBase Reference]
7790-76-3(CAS DataBase Reference) | [EPA Substance Registry System]
Diphosphoric acid, calcium salt (1:2) (7790-76-3) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [WGK Germany ]
3
| [TSCA ]
Yes | [HS Code ]
28353100 | [Hazardous Substances Data]
7790-76-3(Hazardous Substances Data) |
| Hazard Information | Back Directory | [Description]
Calcium 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 Properties]
white powder | [Definition]
ChEBI: Calcium diphosphate is a calcium phosphate. It contains a diphosphate(4-). | [Flammability and Explosibility]
Nonflammable |
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