Iron(II) acetate

(Redirected from Ferrous acetate)

Iron(II) acetate is a coordination complex with formula Fe(O2CCH3)2. It is a white solid, although impure samples can be slightly colored.[1] A light green tetrahydrate is also known, which is highly soluble in water.

Iron(II) acetate
Skeletal formula of iron(II) acetate
IUPAC name
Iron(II) acetate
Other names
Ferrous acetate
3D model (JSmol)
ECHA InfoCard 100.019.492 Edit this at Wikidata
RTECS number
  • AI3850000
  • InChI=1S/2C2H4O2.Fe/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 checkY
  • InChI=1/2C2H4O2.Fe/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2
  • coordination form: CC(O1)O[Fe]12OC(O2)C
  • ionic form: Cc(=o)[o-].[Fe+2].Cc(=o)[o-]
Molar mass 173.933 g·mol−1
Appearance White crystals (anhydrous)
Light green crystals (tetrahydrate)
Odor Odorless
Density 1.734 g/cm3 (−73 °C)[1]
Melting point 190–200 °C (374–392 °F; 463–473 K)
Orthorhombic, oP75 (200 K)
Pbcn, No. 60 (200 K)[1]
2/m 2/m 2/m (200 K)
a = 18.1715(4) Å, b = 22.1453(5) Å, c = 8.2781(2) Å (200 K)
α = 90°, β = 90°, γ = 90°
GHS labelling:
GHS07: Exclamation mark[3]
H315, H319, H335[3]
P261, P305+P351+P338[3]
NFPA 704 (fire diamond)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation and structureEdit

Although ferrous acetate can be viewed as a simple salt, X-ray crystallography reveals a complicated polymeric structure.[1]

Iron powder reacts with acetic acid in electrolysis to give the ferrous acetate, with evolution of hydrogen gas:[1]

Fe + 2 CH3CO2H → Fe(CH3CO2)2 + H2

It can also be made from the insoluble, olive green, Iron(II) carbonate.[citation needed]

It adopts a polymeric structure with octahedral Fe(II) centers interconnected by acetate ligands. It is a coordination polymer.[1]

A hydrated form be made by the reaction of ferrous oxide or ferrous hydroxide with acetic acid.[5]

Reaction of scrap iron with acetic acid affords a brown mixture of various iron(II) and iron(III) acetates that are used in dyeing.[6]


Ferrous acetate is used as a mordant by the dye industry. Ebonizing wood is one such process.[7]


  1. ^ a b c d e f Weber, Birgit; Betz, Richard; Bauer, Wolfgang; Schlamp, Stephan (2011). "Crystal Structure of Iron(II) Acetate". Zeitschrift für anorganische und allgemeine Chemie. 637: 102–107. doi:10.1002/zaac.201000274.
  2. ^ a b Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
  3. ^ a b c d Sigma-Aldrich Co., Iron(II) acetate. Retrieved on 2014-05-03.
  4. ^ "MSDS of Ferrous acetate". Fair Lawn: Fisher Scientific. Retrieved 2014-08-02.
  5. ^ "Synthesis of Iron(II) acetate hydrate (ferrous acetate)". Archived from the original on 2013-08-25. Retrieved 2009-01-07.
  6. ^ Wildermuth, Egon; Stark, Hans; Friedrich, Gabriele; Ebenhöch, Franz Ludwig; Kühborth, Brigitte; Silver, Jack; Rituper, Rafael (2000). "Iron Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a14_591.
  7. ^ Ebonizing Wood with Ferric Acetate