| C8H6N2O6 | F(000) = 928 |
| Mr = 226.15 | Dx = 1.631 Mg m−3 |
| Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
| Hall symbol: -C 2yc | Cell parameters from 2019 reflections |
| a = 26.8441 (16) Å | θ = 3.0–27.1° |
| b = 5.1044 (3) Å | µ = 0.14 mm−1 |
| c = 13.8853 (10) Å | T = 296 K |
| β = 104.544 (3)° | Needle, yellow |
| V = 1841.6 (2) Å3 | 0.28 × 0.09 × 0.08 mm |
| Z = 8 |