Tween 80 is a kind of non-ionic emulsifier synthesized artificially, which is widely used in cosmetics, food and pharmaceutical preparations. This product is widely used in oil exploitation and transportation, medicine, cosmetics, paint, pigment, textile, food, pesticide. It is used as emulsifier, dispersant, stabilizer, dispersant, lubricant, softener, antistatic agent, antirust agent, finishing agent, viscosity reducer and so on in detergent production and metal surface antirust cleaning.