<unk> ,  or<unk> enzol (see also<unk>  is an organic chemical compound with the formula C6H6. It is sometimes abbreviated Ph–H.<unk>  is a colorless and flammable liquid with a sweet smell and a relatively high melting point. It is carcinogenic and its use as an additive in gasoline is now limited,<unk> ut it is an important industrial solvent and precursor in the production of drugs, plastics, synthetic rubber, and dyes.<unk>  is a natural constituent of crude oil,<unk> ut it is usually synthesized from other compounds present in petroleum.<unk>  is an aromatic hydrocarbon and the second [n]-annulene (-annulene), a cyclic hydrocarbon with a continuous pi<unk> ond.
Benzene
Cyclohexane
Acetylene
Toluene
Xylene
Nitrobenzene
Nitrazine
Acrolein