3-Hy­droxy-1-[(morpholin-4-yl)meth­yl]pyridazin-6(1H)-one

In the title compound, C₉H₁₃N₃O₃, the morpholine ring adopts a chair conformation and its mean plane makes a dihedral angle of 68.00 (11)° with the pyridazine ring. The carbonyl O atom deviates from the plane of the pyridazine ring by 0.0482 (12) Å. An intra­molecular C—H...O hydrogen bond occurs. In the crystal, mol­ecules are linked by O—H...O and C—H...O hydrogen bonds, forming chains along [1-10].