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Aluminium acetate or aluminium ethanoate[1] (also "aluminum ~"), sometimes abbreviated AlAc in geochemistry,[2] can refer to a number of different salts of aluminum with acetic acid.

In the solid state, three salts exist under this name:

  1. Neutral aluminium triacetate, Al(CH3CO2)3, which is formally called aluminium acetate under IUPAC rules, with CAS RN 139-12-8[3]
  2. Basic aluminium diacetate, HOAl(CH3CO2)2, also known as basic aluminium acetate, and formally named hydroxyaluminium diacetate, with CAS RN 142-03-0[3]
  3. Basic aluminium monoacetate, (HO)2AlCH3CO2, also known as dibasic aluminium acetate, and formally named dihydroxyaluminium acetate, with CAS RN 7360-44-3

In aqueous solution, aluminium triacetate hydrolyses to form a mixture of the other two,[1] and all solutions of all three can be referred to as "aluminium acetate" as the species formed co-exist and inter-convert in chemical equilibrium.


  1. ^ a b Daintith, John, ed. (2008). "Aluminium ethanoate (aluminium acetate)". A Dictionary of Chemistry (6th ed.). Oxford University Press. ISBN 9780199204632.
  2. ^ Wesolowski, D. J.; Blencoe, J. G.; Cole, D. R.; Bell, J. L. S.; Palmer, D. A. (1992). "Geochemistry of Crustal Processes to High Temperatures and Pressures". Summaries of FY 92 Geosciences Research (PDF). United States Department of Energy. pp. 38–44.
  3. ^ a b Perry, Dale L.; Phillips, Sidney L., eds. (1995). Handbook of Inorganic Compounds. CRC Press. p. 3. ISBN 9780849386718.