N-methylaniline is the main product of n-alkyl aromatic amine series. It is an important intermediate of fine chemical industry and has a wide range of uses. N-methylaniline is a colorless oily liquid at room temperature, which is soluble in ethanol, ether and chloroform, insoluble in water and not easy to evaporate. However, it is not conducive to distribution in the cylinder of multi cylinder engine. It has stable properties and is not easy to decompose in air and dark environment. The main characteristics of blended gasoline with N-methylaniline antiknock agent are odor, high density, unstable unwashed gum and low olefin value, which need auxiliary antiknock agents such as MTBE and MMT. N-methylaniline is a widely used fine chemical product. It is mainly used in the production of pesticides, dyes, dye intermediates, rubber additives and explosives. It can also be used as solvent and acid acceptor, as organic synthesis intermediates, acid absorbents and solvents. It is used in the production of cationic brilliant red FG, Cationic Pink B and reactive yellow brown kGr in dye industry. It can also be used to improve the octane number of gasoline, organic synthesis and solvent.