CAS 100-42-5 HS code 2902500000 180KG/drum,14.4tons/20GP Styrene is an organic compound with the chemical formula C6H5CH=CH2. This derivative of benzene is a colorless oily liquid, although aged samples can appear yellowish. The compound evaporates easily and has a sweet smell, although high concentrations have a less pleasant odor. Styrene is the precursor to polystyrene and several copolymers. Styrene is mainly used in the production of styrene series resins and styrene-butadiene rubber. It is also one of the raw materials for the production of ion exchange resins and pharmaceuticals. In addition, styrene can lso be used in industries such as , dyes, pesticides, and mineral processing.