Trisodium bis-{1-[iminio-(morpholino)meth-yl]guanidinium} bis-[hexa-hydrogen-hexa-molybdoaluminate(III)] chloride icosa-hydrate.

In the title compound, Na3(C6H15N5O)2[Al(OH)6Mo6O18]2Cl·20H2O, the [Al(OH)6Mo6O18]3− polyoxo­anion has a B-type Anderson structure exhibiting approximate D3d symmetry. There are two types of sodium cations: the Na+ cations of type I have a distorted octa­hedral coordination geometry formed by six O atoms and are statistically distributed over two positions with equal occupancies, while the coordination polyhedra of the two Na+ cations of type II share one Cl anion located on an inversion center. The latter fragment, containing a Cl anion and two sodium cations, links two polyoxoanions into centrosymmetric blocks. The diprotonated 1-[imino­(morpholino)meth­yl]guanidinium cations and uncordinated water mol­ecules contribute to extensive N—H⋯O and O—H⋯O hydrogen bonding, resulting in the formation a three-dimensional supra­molecular structure.