4-Amino-3,5-bis(1-hydroxyethyl)-4H-1,2,4-triazole

In the title compound, C4H8N4O2, which was synthesized by the reaction of lactic acid with hydrazine hydrate under solvent-free conditions, all bond lengths and angles are normal. In the crystal structure, inter­molecular O—H⋯N and N—H⋯O hydrogen bonds link the mol­ecules into two-dimensional corrugated sheets parallel to the bc plane.