It can be used as the intermediates of organic synthesis for the production of octadecyl quaternary ammonium salts and many kinds of additives such as cationic grease thickener, mineral flotation agents, pesticides and asphalt emulsifier, fabric antistatic agents, softeners, wetting agents and waterproofing agents, surfactants, biocides, color former of color photo and the corrosion inhibitor of the oil refining device. Putting the Octadecanamine in mixture with ethylene oxide in a molar ratio of 1: 2 for reaction at 150-190 ℃ can gives stearyl diethanolamine [10213-78-2] with a yield of 80%. Stearyl diethanolamine belongs to a non-ionic antistatic agent and can be applied to polypropylene, polystyrene and ABS resin.