1-Phenyl-1H-pyrazole-4-carbaldehyde

In the title mol­ecule, C(10)H(8)N(2)O, the five- and six-membered rings form a dihedral angle of 10.14 (9)°. The aldehyde group is almost coplanar with the pyrazole ring to which it is connected [O—C—C—C torsion angle = −179.35 (17)°]. In the crystal, inversion dimers are linked by four C—H⋯O inter­actions as the carbonyl O atom accepts two such bonds. The dimeric aggregates are linked into supra­molecular layers in the ac plane by C—H⋯π and π–π [ring centroid(pyrrole)⋯ring centroid(phen­yl) = 3.8058 (10) Å] inter­actions.