N-[(5-Chloro-3-methyl-1-phenyl-1H-pyrazol-4-yl)carbon-yl]-N'-(4-hydroxy-phen-yl)thio-urea.

In the title compound, C(18)H(15)ClN(4)O(2)S, the pyrazole ring makes dihedral angles of 67.4 (1) and 12.5 (1)° with the phenyl and 4-hydroxy-phenyl groups, respectively; the two benzene rings are twisted by 60.1 (1)° with respect to each other. The thio-urea NH groups are involved in N-H⋯O and N-H⋯Cl intra-molecular hydrogen bonds. A hydrogen bond between the phenolic OH group and the pyrazole N atom connects mol-ecules into a one-dimensional polymeric structure.