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In the title salt, C 20 H 20 N 62+ ·2ClO 4− , the cation is disposed about a center of symmetry at the mid-point of the N=N bond. The 1,8-naphthyridine systems are planar and the ten atoms have a mean deviation of 0.01 Å from the least-squares plane. The two planar 1,8-naphthyridine units are parallel but extend in opposite directions from the diazene bridge. The 1,8-naphthyridine aminium groups inter­act with perchlorate O atoms through N—H⋯O hydrogen bonds.

2,2′,4,4′-Tetramethyl-7,7′-diazenediylbis(1,8-naphthyridin-1-ium) bis(perchlorate)