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1. Propylene glycol is an important raw material of unsaturated polyester, epoxy resin, polyurethane resin, plasticizer and surfactant, which accounts for about *5% of the total consumption of propylene glycol. This kind of unsaturated polyester is widely used in surface coatings and reinforced plastics.Propylene glycol has good viscosity and moisture absorption, and is non-toxic, so it is widely used as a moisture absorbent, antifreeze, lubricant and solvent in the food, medicine and cosmetics industries.In the food industry, propylene glycol and fatty acid react to form propylene glycol fatty acid ester, which is mainly used as food emulsifier.Propylene glycol is an excellent solvent for condiments and pigments.Because of its low toxicity, it is used in the food industry as a solvent for flavoring and food coloring.Propylene glycol is often used in the pharmaceutical industry as a solvent for the manufacture of various ointments, ointments, softeners and excipients, and in the pharmaceutical industry as a solvent for mixing agents, preservatives, ointments, vitamins, penicillin, etc.Because of the good solubility of propylene glycol and various spices, it is also used as a solvent and softener for cosmetics.Propylene glycol is also used as a humidifier for tobacco, a mildew inhibitor, a lubricant for food processing equipment and a solvent for food marking inks.The aqueous solution of propylene glycol is an effective antifreeze agent.It is also used as tobacco wetting agent, mildew agent, fruit ripening preservative, antifreeze and heat carrier.

2. Used in organic synthesis, as solvent, dehydrating agent, plasticizer, antifreeze agent, gas chromatographic fixative.

3. Common organic synthetic raw materials, used for the manufacture of unsaturated polyester resin.It can also be used as emulsifier, antiseptic and antifreeze.Also used in the manufacture of alkyd resin, polypropylene glycol, plasticizer, surfactant and lubricants.Because of its good hygroscopicity and low toxicity, it is used in the pharmaceutical industry as a mediator, antiseptic, ointment, ointment, pill and vitamin, as well as as a softener and excipient.Used in the food industry as a solvent for flavoring, condiments, and food coloring.It is also used as tobacco humidifier, mildew inhibitor, fruit ripening preservative, coating film forming agent, antifreeze and heat transfer medium, etc.Often used as a substitute for ethanol and glycerin, it can be used as a wetting agent in combination with glycerin or sorbitol in toothpaste and cosmetics.