C6H9N2+·C7H3N2O7−	Z = 2
Mr = 336.27	F(000) = 348
Triclinic, P1	Dx = 1.569 Mg m−3
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 5.8673 (7) Å	Cell parameters from 5139 reflections
b = 8.0991 (9) Å	θ = 2.7–32.4°
c = 15.2437 (17) Å	µ = 0.13 mm−1
α = 86.844 (3)°	T = 100 K
β = 84.252 (3)°	Block, yellow
γ = 81.209 (3)°	0.29 × 0.14 × 0.08 mm
V = 711.69 (14) Å3