Propylene Glycol USP / Food Grade 16 oz. Common Use: Heat Transfer Fluids, Fragrance, Cosmetics and Personal Care, Food and Flavorings, Pet Food/Animal Feed, Pharmaceutical. What is Propylene Glycol Propylene glycol is a clear, colorless, slightly syrupy liquid at room temperature. It may exist in air in the vapor form, although propylene glycol must be heated or briskly shaken to produce a vapor. Propylene glycol is practically odorless and tasteless. Propylene glycol is a chemical made by reaction of propylene oxide with water. Propylene glycol has had an unsurpassed reputation for safe use in a wide range of consumer products, including food products, animal feed, cosmetics and pharmaceuticals, as well as industrial applications. It's used as a stabilizer (to keep things held together, and keep them from evaporating), and to keep foods moist. It's used in many of the foods that we eat, and the FDA deems it safe for human consumption. Glycerin - USP / Food Grade / Kosher is a natural product derived from organic vegetable oils. This refined oil is colorless and odorless with a slightly sweet taste. Plant Guru Glycerin is a relatively viscous oil used in various industries with the number of applications to vast to count. Its natural properties will bring smoothness and provide lubrication while acting as a humectant. In the food industry it is often used as a solvent and sweetener.