DR TIM EVANS / SCIENCE PHOTO LIBRARY DR TIM EVANS / SCIENCE PHOTO LIBRARY
Benzene. Computer model of a molecule of benzene. Atoms are represented as rods and are colour- coded: carbon (blue) and hydrogen (white). Benzene is a highly flammable colourless liquid with a characteristic smell. It is obtained commercially from petroleum. Benzene is used as an additive in petrol, to manufacture other chemicals, and as a solvent for many simple organic compounds. Benzene is a carcinogen, with long-term exposure causing leukaemias (cancers of blood cells).
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