Glycerol (also called glycerine or glycerin) is a simple polyol compound. It is a colorless, odorless, viscous liquid that is sweet-tasting and non-toxic. The glycerol backbone is found in all lipids known as triglycerides. It is widely used in the food industry as a sweetener and humectant. Glycerol has three hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature. 1. Used to make nitroglycerin, alkyd resin and epoxy resin. 2. In medicine, it is used to prepare various preparations, solvents, hygroscopic agents, antifreeze and sweeteners, and to prepare external ointments or suppositories. 3. In the coating industry, it is used to prepare various alkyd resins, polyester resins, glycidyl ethers and epoxy resins. 4. Used in the textile and printing and dyeing industries to prepare lubricants, moisture absorbents, fabric anti-shrinkage treatment agents, diffusing agents and penetrants. 5. In the food industry, it can be used as a sweetener, hygroscopic agent and solvent for tobacco agents. 6. It is widely used in papermaking, cosmetics, tanning, photography, printing, metal processing, electrical materials and rubber industries. 7. It is also used as fuel for automobiles and airplanes as well as antifreeze in oil fields. 8. Glycerin can be used as a plasticizer in the new ceramic industry.