Sweetener; humectant, wetting agent, dispersing agent, petroleum based; its glycerin like taste has made it popular for children's medications and other elixirs; used in many topical creams and ointments, cosmetics, hair products and deodorants; has been linked with fatal heart attacks (when given intravenously), central nervous system depression and cosmetic or pharmaceutical contact dermatitis. What are ethylene glycol and propylene glycol? Both ethylene glycol and propylene glycol are clear, colorless, slightly syrupy liquids at room temperature. Either compound may exist in air in the vapor form, although propylene glycol must be heated or briskly shaken to produce a vapor. Ethylene glycol is odorless but has a sweet taste. Propylene glycol is practically odorless and tasteless. Both compounds are used to make antifreeze and de-icing solutions for cars, airplanes, and boats; to make polyester compounds; and as solvents in the paint and plastics industries. Ethylene glycol is also an ingredient in photographic developing solutions, hydraulic brake fluids and in inks used in stamp pads, ballpoint pens, and print shops.