1. It is used as a raw material for resins, plasticizers, surfactants, emulsifiers and demulsifiers, and can also be used as an antifreeze and a heat carrier. 2. Used as a gas chromatographic fixative, solvent, antifreeze, plasticizer and dehydrating agent. 3. Can be used as a carrier solvent; wetting agent; humectant; anti-caking agent; antioxidant; tissue modifier; surfactant; stabilizer; thickener; dough conditioner; emulsifier; flavor; Processing aids. It is mainly used as a solvent for various spices, pigments, preservatives, extraction solvents for vanilla beans, roasted coffee grains, natural flavors, etc. Moisturizing and softening agents for candy, bread, packaged meat, cheese, etc. It can also be used as a mold inhibitor for noodles and stuffing cores. Adding 0.006% to the soymilk can make the flavor unchanged during heating, and make a white and shiny packaged tofu, which is bulky when fried. 4. Propylene glycol is an intermediate of the fungicide difenoconazole. 5. It can be used as a solvent. It can dissolve food additives such as preservatives, pigments, antioxidants and other water-insoluble food additives, and then add food; it has strong hygroscopicity and has moisturizing and anti-freezing effect on food. China's regulations can be used for pastry, the maximum use is 3.0g / kg. 6. Propylene glycol is an important raw material for unsaturated polyester, epoxy resin and polyurethane resin. The amount of this is about 45% of the total consumption of propylene glycol. This unsaturated polyester is widely used in surface coatings and reinforced plastics. 7. As a drug carrier, a granule drug. It can be used as a moisturizer, softener, solvent, etc. in cosmetics. It can be used as a tobacco flavor, tobacco moisturizer, preservative, etc. in the tobacco industry. In the food industry, it is used as a flavor, a solvent for food coloring, a food packaging softener, a food anti-adhesive agent, and the like. It can also be used to produce unsaturated polyester resin, plasticizer, dehydrating agent, surfactant, curing agent, binder and other raw materials. Can also be used in paints, pesticides, coatings and other industries.