ZnOAc2

ZnOAc2 is the shorthand for zinc acetate, a zinc salt of acetic acid with the formula Zn(OAc)2. In typical samples the compound appears as the anhydrous salt Zn(OAc)2 or as the dihydrate Zn(OAc)2·2H2O. The anhydrous form is a white, crystalline solid that is hygroscopic and dissolves readily in water and many polar organic solvents. The dihydrate form is also common and is slightly less hygroscopic. Zinc acetate can slowly hydrolyze in air to basic zinc acetates, especially under moist conditions.

Preparation of zinc acetate is usually accomplished by neutralizing acetic acid with a zinc oxide, zinc carbonate, or refined zinc metal. A representative reaction is ZnO + 2 HOAc → Zn(OAc)2 + H2O. The product can be isolated as the anhydrous salt or crystallized as the dihydrate from aqueous solutions.

Applications of Zn(OAc)2 are diverse. It is used as a Lewis acid catalyst in organic synthesis, promoting reactions such as esterification, transesterification, and certain condensation processes. It also serves as a mordant in dyeing and printing, helping dyes bond to fabrics. In pharmaceuticals and cosmetics, zinc acetate acts as a source of zinc in dietary supplements and lozenges, and it appears in formulations where zinc supplementation is desired. It can also function as a corrosion inhibitor and as a stabilizer in some polymers and wood treatments.

Safety considerations include its irritant properties; it can irritate skin, eyes, and the respiratory tract. It should be handled with appropriate protective equipment and stored in a dry place. Ingestion of large amounts can be harmful.