The interaction of organic ligands, i.e., acetate, oxalate, lactate, and salicylate, with a pure Al-13 solution was studied by combining Al-27 NMR and small-angle X-ray scattering. In all cases, the addition of organics led to the quasi complete depolymerization of the tridecamer. Variable reaction kinetics were observed according to the ligand. The proportion of Al-13 in 2-h-aged suspensions never exceeded 2%. The mechanism of decomposition is thought to imply the depolymerization of the tridecamer into oligomers, and then into monomers.