N-Ethylaniline (NEA) is a secondary aromatic amine. One of the methods reported for its synthesis is platinum-catalyzed hydroamination of ethylene with aniline. The ionic properties of NEA has been studied using two-color resonant two-photon mass analyzed threshold ionization spectroscopy. Its oxidation by periodate in water-acetone medium has been investigated. The charge-transfer complex formed by the interaction of NEA with iodine has been studied spectrophotometrically in different solvents. It undergoes “ABBCC”-type five component reaction with formaldehyde and acetylacetone to form tricyclic derivatives. Copolymers of aniline and N-ethylaniline has been synthesized and analyzed.