1-Benzoyl-2-thiobiuret

In the title compound [systematic name: N-(carbamoylcarbamothioyl)benzamide], C9H9N3O2S, the benzoyl and terminal urea fragments adopt cisoid and transoid conformations, respectively, with respect to the S atom. The benzoyl and thiobiuret groups are almost coplanar, making a dihedral angle of 8.48 (5)°. The molecular structure is stabilized by an intramolecular N—H...O hydrogen bond. In the crystal, N—H...O and N—H...S hydrogen bonds link the molecules into a sheet parallel to the bc plane.