4-(Dimethyl-amino)benzaldehyde.

The title compound, C(9)H(11)NO, crystallizes with two independent but essentially identical mol-ecules in the asymmetric unit, which are linked via a C-H⋯π inter-action. In both mol-ecules, the aldehyde and dimethyl-amine groups are essentially coplanar with the attached benzene ring. In the crystal structure, C-H⋯O hydrogen bonds link one type of independent mol-ecules into a chain along the a axis. In addition, the structure is stabilized by π-π stacking inter-actions involving the benzene rings [centroid-to-centroid distance = 3.697 (2) Å].