Benzene. Computer-generated model of a molecule of benzene (C6H6). The benzene molecule contains six carbon atoms (coloured white) arranged in the form of a ring, each with an attached hydrogen atom (blue). Atoms are represented as Van Der Waal's dotted spheres; an inner skeleton of atomic bonds is seen. Benzene is a carcinogenic, aromatic hydrocarbon. Due to its ring structure it is the simplest stable compound having an aromatic character. Benzene is a colourless liquid at room temperature. It is a good solvent for fats, and is obtained from petroleum by catalytic reforming.