Iron(III) pyrophosphate

Names
Other names

Ferric pyrophosphate

Identifiers

CAS Number

* 10058-44-3 (anhydrous)
* 10049-18-0 (nonahydrate)
* 1802359-96-1

3D model (JSmol)

* Interactive image

ChEBI |

* CHEBI:132767

ChemSpider |

* 23258
* 34994433

DrugBank |

* DB09147
* DB13995

EC Number |

* 233-190-0

PubChem CID

* 24877

UNII |

* QK8899250F
* 1ZJR117WBQ (nonahydrate)
* UBY79OCO9G

InChI

* Key: CADNYOZXMIKYPR-UHFFFAOYSA-B

* InChI=1S/4Fe.3H4O7P2/c;;;;3*1-8(2,3)7-9(4,5)6/h;;;;3*(H2,1,2,3)(H2,4,5,6)/q4*+3;;;/p-12

SMILES

* [Fe+3].O=P([O-])([O-])OP(=O)([O-])[O-].[Fe+3].O=P([O-])([O-])OP(=O)([O-])[O-].[Fe+3].O=P([O-])([O-])OP(=O)([O-])[O-].[Fe+3]

Properties

Chemical formula

| Fe4(P2O7)3
Molar mass | 745.224 (anhydrate)
907.348 (nonahydrate)
Appearance  | yellow solid (nonahydrate)[1]

Solubility in water

| insoluble
Pharmacology
Legal status |

* CA: ℞-only [2]
* US: ℞-only [3]

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Iron(III) pyrophosphate is an inorganic chemical compound with the formula Fe4(P2O7)3.

## Synthesis

Anhydrous iron(III) pyrophosphate can be prepared by heating the mixture of iron(III) metaphosphate and iron(III) phosphate under oxygen with the stoichiometric ratio 1:3. The reactants can be prepared by reacting iron(III) nitrate nonahydrate with phosphoric acid.[4]

It can be also prepared via the following reaction:[5]

3 Na4P2O7(aq) + 4 FeCl3(aq) → Fe4(P2O7)3(s) + 12 NaCl(aq)

## References

1. ↑ W.M.Haynes. CRC Handbook of Chemistry and Physics (97th edition). New York: CRC Press, 2016. pp 4-68
2. ↑ "Summary Basis of Decision (SBD) for Triferic Avnu". 23 October 2014. https://hpr-rps.hres.ca/reg-content/summary-basis-decision-detailTwo.php?linkID=SBD00545&lang=en.
3. ↑ "Triferic Avnu- ferric pyrophosphate citrate solution". 15 September 2020. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=51197a48-6078-42cd-b5ed-5ea22b6757b4.
4. ↑ Elbouaanani, L.K; Malaman, B; Gérardin, R; Ijjaali, M (2002). "Crystal Structure Refinement and Magnetic Properties of Fe4(P2O7)3 Studied by Neutron Diffraction and Mössbauer Techniques". Journal of Solid State Chemistry (Elsevier BV) 163 (2): 412–420. doi:10.1006/jssc.2001.9415. ISSN 0022-4596. Bibcode: 2002JSSCh.163..412E.
5. ↑ "Colloidal iron(III) pyrophosphate particles". Food Chem 151: 243–7. May 2014. doi:10.1016/j.foodchem.2013.11.050. PMID 24423528.

## External links

* "Ferric pyrophosphate". Drug Information Portal. U.S. National Library of Medicine. https://druginfo.nlm.nih.gov/drugportal/name/ferric pyrophosphate.
* "Ferric pyrophosphate nonahydrate". Drug Information Portal. U.S. National Library of Medicine. https://druginfo.nlm.nih.gov/drugportal/name/ferric pyrophosphate nonahydrate.
* "Ferric pyrophosphate citrate". Drug Information Portal. U.S. National Library of Medicine. https://druginfo.nlm.nih.gov/drugportal/name/ferric pyrophosphate citrate.

* v
* t
* e

Iron compounds

Fe(-II)|

* Na2Fe(CO)4

Fe(0)|

* Fe(CO)5
* Fe2(CO)9
* Fe3(CO)12
* Fe(CO)3CH3COC2H2C6H6

Fe(I)|

* FeH

| Organoiron(I) compounds|

* (C5H5FeCO)2(CO)2

|

Fe(0,II)|

* Fe3C

Fe(II)|

* FeBr2
* FeCl2
* FeF2
* FeI2
* FeH2
* FeMoO4
* FeO
* Fe(OH)2
* FeS
* FeSO4
* FeSe
* FeSeO4
* FeSi2
* FeTiO3
* FeCO3
* FeC2O4
* Fe(C2H3O2)2
* Fe(C3H5O3)2
* FeC6H6O7
* FeC12H22O14
* Fe2CrO4
* Fe3(PO4)2
* H2Fe(CO)4
* Fe(HCO3)2
* Mg2FeH6

| Organoiron(II) compounds|

* Fe(C5H5)2
* Fe(C5H4P(C6H5)2)2
* C4H4Fe(CO)3
* C4H6Fe(CO)3

|

Fe(0,III)|

* Fe3P

Fe(II,III)|

* Fe3O4
* Fe3S4

Fe(III)|

* FeBr3
* FeCl3
* FeF3
* FeI3
* Fe(NO3)3
* Fe(acac)3
* FeOCl
* FeO(OH)
* FePO4
* Fe4(P2O7)3
* Fe2(CrO4)3
* Fe2(C2O4)3
* Fe2O3
* Fe2S3
* Fe2(SO4)3
* FeBO3
* FeB

| Organoiron(III) compounds|

* Fe(C5H5)2BF4
* C6H8O7⋅xFe3+⋅yNH3

|

Fe(VI)|

* K2FeO4
* BaFeO4

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