Aromatics
Benzene
Benzene is an important organic chemical compound with the chemical formula C6H6. The benzene molecule is composed of 6 carbon atoms joined in a ring with 1 hydrogen atom attached to each. As it contains only carbon and hydrogen atoms, benzene is classed as a hydrocarbon.
Benzene is a natural constituent of crude oil and is one of the elementary petrochemicals.
Toluene
Toluene is a colorless, water-insoluble liquid with the smell associated with paint thinners.
it is an aromatic hydrocarbon. Toluene is predominantly used as an industrial feedstock and a solvent.