Tetrasodium Pyrophosphate → Calcium pyrophosphate (Ca2P2O7)

Reaction equation

[Cl-].[Ca+2:2].[Cl-].[O-:4][P:5]([O:8][P:9]([O-:12])([O-:11])=[O:10])(=[O:7])[O-:6].[Na+].[Na+].[Na+].[Na+]>>[O-:6][P:5]([O:8][P:9]([O-:12])([O-:11])=[O:10])(=[O:4])[O-:7].[Ca+2:2].[Ca+2:2]

Participants

Reactant 2

HCID 24403Tetrasodium Pyrophosphate

HCID 5284359Calcium Chloride

Product 1

HCID 24632Calcium pyrophosphate (Ca2P2O7)

Procedure

However, when 150 mM calcium chloride solution and 75 mM tetrasodium pyrophosphate solution, both adjusted to pH 7, were used to form the initial mixture, very small fibrous calcium pyrophosphate particles with a diameter of about 1 to 3 microns were formed. Similar results were obtained when 75 mM calcium chloride solution and 37.5 mM tetrasodium pyrophosphate solution were used to form the initial mixture.

Sources & evidence

ORD record: ord-3b721d408c9a47fe82ab66a394770963
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08889745B2

Reaction notes

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