Antimony(III) acetate

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Antimony(III) acetate
Antimony(III) acetate
IUPAC name
Antimony(III) acetate
Other names
Antimony triacetate
Acetic acid, antimony(3+) salt
3D model (JSmol)
ECHA InfoCard 100.027.312
RTECS number AF4200000
Appearance White powder
Density 1.22 g/cm³ (20 °C)
Melting point 128.5 °C (263.3 °F; 401.6 K) (decomposes to Sb2O3)
NFPA 704
Flammability code 0: Will not burn. E.g., waterHealth code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentineReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogenSpecial hazards (white): no codeNFPA 704 four-colored diamond
Lethal dose or concentration (LD, LC):
4480 mg/kg (rat)
US health exposure limits (NIOSH):
PEL (Permissible)
TWA 0.5 mg/m3 (as Sb)[1]
REL (Recommended)
TWA 0.5 mg/m3 (as Sb)[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Antimony(III) acetate is the compound of antimony with the chemical formula of Sb(CH3CO2)3. It is a white powder, is moderately water-soluble, and is used as a catalyst in the production of polyesters.


It can be prepared by the reaction of antimony(III) oxide with acetic acid:

Sb2O3 + 6 CH3CO2H → 2 Sb(CH3CO2)3 + 3 H2O


The crystal structure of antimony(III) acetate has been determined by X-ray crystallography. It consists of discrete Sb(OAc)3 monomers with monodentate acetate ligands. The monomers are linked together into chains by weaker C=O···Sb intermolecular interactions.[2]


  1. ^ a b NIOSH Pocket Guide to Chemical Hazards. "#0036". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ Hall, M.; Sowerby, D. B. (1980). "Antimony(III) acetate and thioacetate: spectra and crystal structures". J. Chem. Soc., Dalton Trans. (8): 1292–1296. doi:10.1039/DT9800001292.