1-Hydroxy-4-aza-1-azoniabicyclo[2.2.2]octane picrate.

In the crystal structure of the title compound, C(6)H(13)N(2)O(+)·C(6)H(2)N(3)O(7) (-), the anions and cations are linked by O-H⋯O, C-H⋯O and C-H⋯N hydrogen bonds into a three-dimensional network. The O atoms of a nitro group of the picrate anion are disordered over two positions of equal occupancy.