Iron(III) chromate

Iron(III) chromate is the iron(III) salt of chromic acid with the chemical formula Fe₂(CrO₄)₃.

Iron(III) chromate^[1]

Names
IUPAC name iron(III) chromate
Identifiers
CAS Number	10294-52-7 Y
3D model (JSmol)	Interactive image
ChemSpider	10653099
ECHA InfoCard	100.030.588
EC Number	233-661-0
PubChem CID	21902690
UNII	O2123EJH4E N
CompTox Dashboard (EPA)	DTXSID101045361
InChI InChI=1S/3Cr.2Fe.12O/q;;;2*+3;;;;;;;6*-1 Key: OXLBLZDGMWMXSM-UHFFFAOYSA-N
SMILES [O-][Cr](=O)(=O)[O-].[O-][Cr](=O)(=O)[O-].[O-][Cr](=O)(=O)[O-].[Fe+3].[Fe+3]
Properties
Chemical formula	Fe2(CrO4)3
Molar mass	459.6808 g/mol
Appearance	yellow powder
Solubility in water	reacts, see also solubility chart
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	toxic (contain Cr(VI))
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Discovery

Iron(III) chromate was discovered by Samuel Hibbert-Ware in 1817 while visiting Shetland.^[2]

Production

It may be formed by the salt metathesis reaction of potassium chromate and iron(III) nitrate, which gives potassium nitrate as byproduct.

2 Fe(NO₃)₃ + 3 K₂CrO₄ → Fe₂(CrO₄)3 + 6 KNO₃

It also can be formed by the oxidation by air of iron and chromium oxides in a basic environment:

4 Fe₂O₃ + 6 Cr₂O₃ + 9 O₂ → 4 Fe₂(CrO₄)₃