Iron(III) chromate

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Iron(III) chromate[1]
CAS number 10294-52-7 YesY
PubChem 21902690
Molecular formula Fe2(CrO4)3
Molar mass 459.671 g/mol
Appearance yellow powder
Solubility in water insoluble
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

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


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


It may be formed by the reaction of potassium chromate and iron(III) nitrate. This reaction forms iron(III) chromate and potassium nitrate. 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


  1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–63. ISBN 0-8493-0594-2. 
  2. ^