Iron(III) pyrophosphate

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;
ECHA InfoCard	100.030.160
EC Number	233-190-0;
PubChem CID	24877;
UNII	QK8899250F; 1ZJR117WBQ (nonahydrate); UBY79OCO9G;
CompTox Dashboard (EPA)	DTXSID6047600 ;
	InChI Key: CADNYOZXMIKYPR-UHFFFAOYSA-B; InChI=1S/4Fe.3H4O7P2/c;;;;31-8(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)

W.M.Haynes. CRC Handbook of Chemistry and Physics (97th edition). New York: CRC Press, 2016. pp 4-68
"Summary Basis of Decision (SBD) for Triferic Avnu". Health Canada. 23 October 2014. Retrieved 29 May 2022.
"Triferic Avnu- ferric pyrophosphate citrate solution". DailyMed. 15 September 2020. Retrieved 29 May 2022.
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. Bibcode:2002JSSCh.163..412E. doi:10.1006/jssc.2001.9415. ISSN 0022-4596.
Rossi L, Velikov KP, Philipse AP (May 2014). "Colloidal iron(III) pyrophosphate particles". Food Chem. 151: 243–7. doi:10.1016/j.foodchem.2013.11.050. PMID 24423528.

"Ferric pyrophosphate". Drug Information Portal. U.S. National Library of Medicine.
"Ferric pyrophosphate nonahydrate". Drug Information Portal. U.S. National Library of Medicine.
"Ferric pyrophosphate citrate". Drug Information Portal. U.S. National Library of Medicine.

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