C8 monomers

Cyclooctene (COE)

Evonik is a leader in the production of industrially available cyclic C8 monomers and offers the four most important synthetic chemicals 1,5-cyclooctadiene (COD), cyclooctene (COE), cyclooctane (COAN), and 4-vinylcyclohex-1-ene (VCH).

Building blocks for your synthesis

The singly unsaturated cyclic hydrocarbon cyclooctene (COE) is a colorless liquid with a boiling point of 145°C.

COE is formed by selective hydrogenation of cyclooctadiene. We produce COE mainly for the manufacture of polyoctenamer (VESTENAMER®) by ring-opening polymerization.
Ozonolysis of COE yields suberic acid. Various perfumes are obtained via a number of intermediate stages. Thermolysis of COE yields the Evonik product 1,7-octadiene, which is also used industrially.

Properties of Cyclooctene

Empirical formula
Molecular weight
110,2 g/mol
Melting point
-16,9 °C
Boiling point 1013 hPa
148 °C
Purity: Cycloocten
min. 96%
Purity: Cyclooctan
max. 4%