(m-Phenyl­enedimethyl­ene)diammonium p-nitro­phenyl­phosphate perchlorate

The title compound, C(8)H(14)N(2) (2+)·C(12)H(8)N(2)O(8)P(−)·ClO(4) (−), was formed by the reaction of α,α-bis-m-xylenediamine and sodium bis-p-nitro­phenyl­phosphate in the presence of Zn(ClO(4))·6H(2)O in methanol solution. The two amine groups of the m-xylenediammonium ion are each protonated and each hydrogen-bonded to two O atoms of the phosphate anion, which acts as a 1,3-bridge. The ammonium groups are arranged matched face to face and each pair is doubly bridged by two perchlorate ions through hydrogen bonding. In addition, there are also weak C—H⋯O inter­actions. Both the N—H⋯O and C—H⋯O inter­actions are contained in a channel down the a axis. The perchlorate oxygen atoms are disordered over two positions with site occupancy factors of ca 0.7 and 0.3.