Iron(II) acetate

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Iron(II) acetate
Iron(II) acetate
CAS number 3094-87-9 YesY
PubChem 161387
ChemSpider 17323 YesY
Jmol-3D images Image 1
Molecular formula C4H6FeO4
Molar mass 173.93 g/mol
Appearance white crystals
Melting point 190–200 °C (374–392 °F; 463–473 K)
Solubility in water reacts
Solubility in other solvents Very soluble
Ksp = 4.87 × 10-17
GHS pictograms GHS-pictogram-exclam.svg[1]
GHS signal word Warning
GHS hazard statements H315, H319, H335[1]
GHS precautionary statements P261, P305+351+338[1]
EU classification Irritant Xi
R-phrases R36/37/38
S-phrases S26, S36
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
LD50 492 mg/kg scu-rat [2]
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(II) acetate is an coordination complex with formula Fe(CH3CO2)2. It is a white solid although impure samples can be slightly colored. A light green tetrahydrate is also known, which is highly soluble in water.

Preparation and structure[edit]

Iron powder reacts with hot acetic acid to give the product:[3]

Fe + 2 CH3CO2H → Fe(CH3CO2)2 + H2

It adopts a polymeric structure with octahedral Fe(II) centers bridged by acetate ligands. It is not a salt.[4]

The hydrate can 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) an iron(III) acetates that are used in dying.[6]


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


  1. ^ a b c Sigma-Aldrich Co., Iron(II) acetate. Retrieved on 2014-05-03.
  2. ^
  3. ^ Horst-Dietrich Hardt and Wolfgang Möller “Über das solvatfreie Eisen(II)-acetat, Fe(CH3COO)2” Zeitschrift für anorganische und allgemeine Chemie 1961 Volume 313, pages 57–69. doi:10.1002/zaac.19613130106
  4. ^ Weber, Birgit; Betz, Richard; Bauer, Wolfgang; Schlamp, Stephan “Crystal Structure of Iron(II) Acetate” Zeitschrift fuer Anorganische und Allgemeine Chemie 2011, volume 637, 102-107. doi:10.1002/zaac.201000274
  5. ^ Synthesis of Iron(II) acetate hydrate (ferrous acetate)
  6. ^ Wildermuth, Egon; Stark, Hans; Friedrich, Gabriele; Ebenhöch, Franz Ludwig; Kühborth, Brigitte; Silver, Jack; Rituper, Rafael (2005), "Iron Compounds", Ullmann's Encyclopedia of Industrial Chemistry, Weinheim: Wiley-VCH, doi:10.1002/14356007.a14_591 
  7. ^ Ebonizing Wood with Ferric Acetate