Propylene glycol (IUPAC name: propane-1,2-diol), according to the National Library of Medicine and Agency for Toxic Substances and Disease Registry, is a synthetic liquid substance that absorbs water. It is labeled an organic compound in chemistry due to its carbon attributes. Propylene Glycol Liquid is a colorless, odorless, and viscous liquid that is widely used in various industries. It is commonly used as a solvent, humectant, and preservative in food, pharmaceuticals, and cosmetics. It is also used as a coolant and antifreeze in the automotive industry and as a de-icing agent in aviation. Additionally, it is used in the production of polyester resins, polyurethane foams, and other industrial products. Its versatility and low toxicity make it a popular choice for a wide range of applications.