Propylene glycol 
 1,3 - propanediol abbreviation of 1,3-PDO, is a colorless, odorless, viscous liquid, soluble in water, alcohol, ether and other organic solvents, mainly used for plasticizers, detergents, corrosion agent, Emulsifier, but also for food, cosmetics and pharmaceutical industries, its main use is as a monomer synthesis-performance polymer materials, not only with the natural cycle of polyester plastic that can be bio- degradation characteristics, and performance is to create a new type of polyester fiber polyethylene terephthalate (PTT) key monomer raw materials, and can replace ethylene glycol, butanediol production of polyol polyesters.