C₉H₁₂, A colorless liquid with a gasoline odor, that is produced by petroleum refining, and combustion of petroleum products. It is a primary skin and eye irritant. Isopropylbenzene is used in paint thinner, additives to high octane aviation fuel, and the production of acetone. In the atmosphere it reacts with photochemically generated hydroxyl radicals. Its half life in the atmosphere is approximately 49 hours.