Ferrous acetate

Iron(II) acetate

Names
IUPAC name Iron(II) acetate
Other names Ferrous acetate
Identifiers
CAS Number	3094-87-9 Y
3D model (Jmol)	Interactive image
ChemSpider	17323 Y
ECHA InfoCard	100.019.492
PubChem	161387
RTECS number	AI3850000
InChI InChI=1S/2C2H4O2.Fe/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 Y Key: LNOZJRCUHSPCDZ-UHFFFAOYSA-L Y InChI=1/2C2H4O2.Fe/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 Key: LNOZJRCUHSPCDZ-NUQVWONBAS
SMILES [Fe+2].[O-]C(=O)C.[O-]C(=O)C
Properties
Chemical formula	C4H6FeO4
Molar mass	173.93 g·mol−1
Appearance	White crystals (anhydrous) Light green crystals (tetrahydrate)
Odor	Odorless
Density	1.734 g/cm3 (−73 °C)
Melting point	190–200 °C (374–392 °F; 463–473 K) decomposes
Solubility in water	Soluble
Structure
Crystal structure	Orthorhombic, oP75 (200 K)
Space group	Pbcn, No. 60 (200 K)
Point group	2/m 2/m 2/m (200 K)
Lattice constant	a = 18.1715(4) Å, b = 22.1453(5) Å, c = 8.2781(2) Å (200 K) α = 90°, β = 90°, γ = 90°
Hazards
GHS pictograms
GHS signal word	Warning
GHS hazard statements	H315, H319, H335
GHS precautionary statements	P261, P305+351+338
EU classification (DSD)	Xi
R-phrases	R36/37/38
S-phrases	S26, S36
NFPA 704	0 2 0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Iron(II) acetate is an coordination complex with formula Fe(C₂H₃O₂)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.

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

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

The hydrate can be made by the reaction of ferrous oxide or ferrous hydroxide with acetic acid.

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

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