1. as resins, plasticizers, surfactants, emulsifiers and demulsifiers materials, may be used as antifreeze and heat carrier. 2. used as gas chromatography stationary phase, solvents, antifreeze agents, plasticizers and dehydrating agent. 3. The carrier solvent; wetting agents; moisturizing agents; anti-caking agents; antioxidants; texturizing agent; surfactant; stabilizer; a thickener; dough modifier; emulsifying agents; flavoring agents; excipient; processing aids . GB 2760 ~ 96 as a food processing aids. Mainly used for a variety of flavors, colors, preservatives, solvents, vanilla beans, roasted coffee grains, spices and other natural extraction solvent. Candy, bread, packaged meats, cheese and other moisturizing, softening. It can also be used for noodles, mildew additive stuffing core classes. Add 0.006% in soymilk, when heat can taste the same, made of white glossy packaging tofu, fried the volume expansion. 4. Propylene glycol is azole fungicide Difenoconazole intermediates. 5. as a solvent, can be preservatives, colorings, antioxidants and other poorly water-soluble food additives dissolved therein, then add food; fairly hygroscopic, moisturizing and anti-freeze food effect. Of the provisions can be used in cakes, the maximum usage is 3.0g / kg. 6. Propylene glycol is unsaturated polyester, epoxy resin, an important raw material for polyurethane resin, the amount in this area accounted for about 45% of the total consumption of propylene glycol, which is used extensively for unsaturated polyester surface coatings and reinforced plastics. Propylene glycol viscosity and good moisture absorption, and non-toxic, and thus in the food, pharmaceutical and cosmetic industry is widely used as a hygroscopic agent, antifreeze, lubricants and solvents. In the food industry, propylene glycol and propylene glycol fatty acid esters of fatty acid reaction, mainly for food emulsifier; Propylene glycol is a good solvent seasoning and pigment. Propylene glycol used in the pharmaceutical industry for the manufacture of various types of ointment, ointment solvent, softener and excipients, etc., because of propylene glycol with various spices has good mutual solubility, which is also used as a solvent and emollient cosmetic and so on. Propylene glycol is also used tobacco moisturizing agents, preservatives, food processing equipment, lubricants and food marking ink solvent. Aqueous glycol anti-freeze agents are effective. 7. As a drug carrier, particles of medications used. It can be used as a humectant in cosmetics, emollients, solvents, etc. The tobacco industry as tobacco flavor, tobacco moisturizing agents, preservatives and the like. The food industry as flavor, food coloring solvents, food packaging softeners, food release agent. Can also be used in the production of unsaturated polyester resins, the plasticizer is a plastic, a dehydrating agent, a surfactant, a curing agent, a binder and other raw materials. It can also be used in paints, pesticides, paints and other industries.