4-(N,N-Diphenylamino)benzaldehyde is an organic compound with the chemical formula C20H17NO. It is a derivative of benzaldehyde, featuring a diphenylamino group attached to the para position of the benzene ring. This molecule is known for its potential applications in the synthesis of various pharmaceuticals and dyes due to its unique structure. The diphenylamino group enhances the molecule's reactivity and stability, making it a valuable intermediate in organic chemistry. It is typically synthesized through the condensation of benzaldehyde with diphenylamine, and its properties, such as its melting point and solubility, can be influenced by the presence of this functional group. The compound is also characterized by its yellow crystalline appearance and is often used as a building block in the creation of more complex organic molecules.