(E)-Methyl N′-(4-hydroxy­benzyl­idene)hydrazinecarboxyl­ate

In the title compound, C(9)H(10)N(2)O(3), the hydroxy group and the C=N—N unit are coplanar with the benzene ring. The benzene rings of inversion-related mol­ecules are stacked with their centroids separated by a distance of 3.7703 (9) Å, indicating weak π–π inter­actions. In the crystal structure, C—H⋯O, O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds link molecules into a infinite two-dimensional network along the a axis.