The crystals of the title salt, 6,21-di­aza-3,9,18,24-tetraazoniatri­cyclo­[22.2.2.2^11,14]­triaconta-11,13,24,26(1),27,29-hexaene benzene-1,2,4,5-tetra­carboxyl­ate(4-) hexahydrate, C₂₄H₄₂N₆⁴⁺·C₁₀H₂O₈^4-·6H₂O, are formed by the intermolecular interaction of a macrocyclic hex­amine with a mol­ecule of C₆H₂(COOH)₄ in aqueous solution. Both the cation and the anion are on inversion centres. Hydro­gen bonds are formed between the four ammonium cations in the hex­amine and the four carboxyl­ate anions in the aromatic acid. Stacks exist along the crystallographic a axis in the solid state. The water mol­ecules also take part in a hydrogen-bonding network which joins these stacks together.