(E)-2-[2-(4-Chloro­benzyl­idene)hydrazin-1-yl]-4-{[3-(dimethyl­aza­nium­yl)prop­yl]amino}­quinazolin-1-ium bis­(perchlorate)

In the title compound, C₂₀H₂₅ClN₆²⁺·2ClO₄⁻, the organic cation is roughly planar, as shown by the dihedral angle of 3.78 (3)° between the quinazoline and chloro­phenyl rings. The quinazoline ring is itself approximately planar, with an average deviation of 0.018 (4) Å. The organic cation adopts an E configuration with respect to the C= N double bond of the hyrazinyl group. The (dimethyl­aza­nium­yl)propyl­amino side chain is disordered over two sets of sites with occupancies of 0.768 (10) and 0.232 (10). In the crystal, two cations and four anions are linked by strong N—H...O hydrogen bonds. Weak C—H...O hydrogen bonds exist among these aggregates.