Sodium ferrioxalate

Sodium ferrioxalate

Names
IUPAC name Sodium iron(III) oxalate, sodium oxalatoferrate, sodium trisoxalatoferrate
Other names Sodium ferrioxalate Sodium ferric oxalate Sodium trisoxalatoferrate (III) Sodium oxalatoferrate
Identifiers
CAS Number	5936-14-1 Y 555-34-0
3D model (JSmol)	Interactive image
ChemSpider	147755
ECHA InfoCard	100.008.267
EC Number	209-092-9
PubChem CID	131855679
CompTox Dashboard (EPA)	DTXSID60890505
InChI InChI=1S/3C2H2O4.Fe.3Na/c3*3-1(4)2(5)6;;;;/h3*(H,3,4)(H,5,6);;;;/q;;;+3;3*+1/p-6 Key: XIPRSXSGWQCSHH-UHFFFAOYSA-H
SMILES O=C(C(=O)O1)O[Fe-3]123(OC(C(=O)O2)=O)OC(C(=O)O3)=O.[Na+].[Na+].[Na+]
Properties
Chemical formula	C6FeNa3O12
Molar mass	388.868 g·mol−1
Appearance	lime green hydrated crystals
Density	1.97 g/cm3 at 17 °C
Solubility in water	32.5pts per 100pts solvent, cold water, 182pts per 100pts, boiling water[1]
Structure
Coordination geometry	octahedral
Dipole moment	0 D
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Corrosive. Eye, respiratory and skin irritant.
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H312
Precautionary statements	P264, P270, P280, P301+P312, P302+P352, P312, P322, P330, P363, P501
Related compounds
Other anions	Potassium ferrioxalate
Related compounds	Iron(II) oxalate Iron(III) oxalate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Sodium ferrioxalate are inorganic compounds with the formula Na₃Fe(C₂O₄)₃(H₂O)_n. The pentahydrate has been characterized by X-ray crystallography. In contrast the potassium, ammonium, and rubidium salts crystallize from water as their trihydrates.^[2]

The compound is a salt consisting of ferrioxalate anions, [Fe(C₂O₄)₃]³⁻, and sodium cations Na⁺. The anion is a transition metal complex consisting of an iron atom in the +3 oxidation state and three bidentate oxalate ions C₂O2−4 anions serving as ligands.

The ferrioxalate anion is sensitive to light and higher-energy electromagnetic radiation, which causes the decomposition of one oxalate to carbon dioxide CO₂ and reduction of the iron(III) atom to iron(II).