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Propylene Glycol is an organic compound. It is a viscous colorless liquid which is nearly odorless but possesses a faintly sweet taste. Uses: Used as a chemical feed stock for the production of unsaturated polyester resins. Used as a humectant, solvent and preservative in food and for tobacco products. Used as a solvent in many pharmaceuticals or personal products propylene glycol USP Grade is used as a non-active enabling agent, also known as an excipient. As an agent, it carries flavors in food and beverages, helps retain taste and moisture in pet and livestock feed, and acts as a carrier of active ingredients found in cough syrup and gel capsules. Propylene glycol keeps personal care products consistent, soft and moist. This includes deodorant sticks, sunscreen, shampoos, body lotions, face creams and lipstick. Additionally, it works as an excipient to stabilize foam in personal care and health care products.