Table 2. Experimental details.

Crystal data
Chemical formula	2C7H8N3 +·SO4 2−·H2O
M r	382.4
Crystal system, space group	Monoclinic, P21/c
Temperature (K)	293
a, b, c (Å)	12.1115 (2), 10.6282 (2), 17.4772 (3)
β (°)	127.723 (1)
V (Å3)	1779.48 (6)
Z	4
Radiation type	Mo Kα
μ (mm−1)	0.22
Crystal size (mm)	0.25 × 0.25 × 0.17
Data collection
Diffractometer	Nonius KappaCCD
No. of measured, independent and observed [I > 3.0σ(I)] reflections	9132, 4563, 2429
R int	0.04
(sin θ/λ)max (Å−1)	0.675
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.041, 0.050, 1.03
No. of reflections	2429
No. of parameters	265
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å−3)	0.25, −0.31

Computer programs: COLLECT (Nonius, 2001 ▸), DENZO/SCALEPACK (Otwinowski & Minor, 1997 ▸), SHELXS97 (Sheldrick, 2008 ▸), CRYSTALS (Betteridge et al., 2003 ▸) and CAMERON (Watkin et al., 1996 ▸).