4-Amino-3-(1,2,4-triazol-1-yl)-1H-1,2,4-triazole-5(4H)-thione

In the mol­ecule of the title compound, C5H7N7S, the essentially planar triazole ring and the 4-amino-5-mercapto-1,2,4-triazole moiety make a dihedral angle of 70.97 (5)°. In the crystal structure, weak inter­molecular N—H⋯N and N—H⋯S hydrogen bonds stabilize the packing.