Antimony(III) acetate is the compound of antimony with the chemical formula of Sb(CH<sub>3</sub>CO<sub>2</sub>)<sub>3</sub>. 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 anhydride:
The crystal structure of antimony(III) acetate has been determined by X-ray crystallography. It consists of discrete Sb(OAc)<sub>3</sub> monomers with monodentate acetate ligands. The monomers are linked together into chains by weaker C=O÷÷÷Sb intermolecular interactions.