Abstract Solid-state self-assembly of 2, 4, 6-trimethylbenzene-1, 3, 5-tris (methanaminium) 2, 4, 6-trimethylbenzene-1, 3, 5-triacetate is mediated by hydrogen bonding. It gives rise to three-dimensional network of hydrogen bonds in which each trication is coordinated with eight trianions and vice versa. The resulting crystal structure topologically corresponds to the simple inorganic cesium chloride type.