EINECS number 202-705-0
CAS number 98-83-9
Alpha-methyl styrene or 2-phenylpropene is a colorless or slightly yellow hydrocarbon aromatic, flammable aromatic organic liquid having an unpleasant odor. It is practically insoluble in water. It is a by-product in the productionn of phenol according to the cumene process.
Alpha-methyl styrene (AMS) is a chemical intermediate used in the manufacture of plasticizers, resins and polymers.
EINECS number 201-052-9
CAS number 77-73-6
Dicyclopentadiene, abbreviated DCPD, is the dimer of cyclopentadiene (CPD). In the pure state DCPD is a volatile solid with a characteristic odour. Dicyclopentadiene is coproduced in large quantities in the steam cracking of naphtha and gas oils to ethylene. In addition, it can be prepared in a Diels-Alderreaction of 2 cyclopentadiene molecules.
Most dicyclopentadiene is used as co-monomer in the production of synthetic resins, in particular unsaturated polyesters and synthetic rubbers, for example EPDM. Poly (DCPD), which contains some dicyclopentadiene as monomer is used in printing inks and engineering plastics.
EINECS number 270-736-7
CAS number 68477-53-2
Pygas or pyrolysis gasoline is a naphtha-range mixture which contains aromatics, olefins and paraffins ranging from C5s to C12s.
It has a high octane number. It is a by-product of high temperature naphtha/propane/gasoil cracking during ethylene and propylene production.
Pygas is generally used as a gasoline blending mixture due to its high octane number.
Benzene rich pygas streams are used as feedstock for the aromatic (benzene) extraction process.