In the title compound, C8H6N4O2, the tetrazole and benzene rings are planar
to within 0.001 (1) and 0.007 (1) Angstrom, respectively. These rings are
not coplanar in the molecule, the dihedral angle between them being 52.90 (
4) degrees. Molecules are connected together by O-H . . .N and C-H . . .O h
ydrogen bonds, forming two-dimensional networks parallel to the xz plane wi
th van der Waals interactions between them.