Chemistry and Chemical Disasters. (Chem) A colorless, aromatic, flammable, liquid hydrocarbon, C6H6, mp 5. 5°C, bp 80. 1°C; dissolves oils, fats, rubber, resins; burns with a smoky flame; used as an internal combustion fuel, solvent, and organic intermediate. Derived from coal or petroleum. The simplest member of the aromatic series of hydrocarbons. Benzene is toxic, and prolonged exposure may lead to nausea, fatigue, and anemia. Vapors form explosive mixtures with air. Also called: Benzol