what is benzene
Benzene is a natural constituent of crude oil, and is one of the most elementary petrochemicals. Benzene is an aromatic hydrocarbon and the second [ n ]- annulene ([6]-annulene), a cyclic hydrocarbon with a continuous pi bond.It is sometimes abbreviated Ph âH. Benzene is a colorless and highly flammable liquid with a sweet smell.enzene is an aromatic hydrocarbon and the second [ n ]- annulene ([6]-annulene), a cyclic hydrocarbon with a continuous pi bond. It is sometimes abbreviated Ph âH. Benzene is a colorless and highly flammable liquid with a sweet smell.