TOPAS Advanced Polymers is the world’s largest producer of the monomer and chemical intermediate norbornene (2-norbornene, norbornen, or norbornylene).

Product Description

What is Norbornene?

This versatile bridged, unsaturated cyclic molecule is used in pharmaceutical intermediates, agricultural compounds, specialty fragrances and high-damping rubber. It is also used in the manufacture of TOPAS® COC (cyclic olefin copolymer) plastic resins, which are high performance copolymers of ethylene and 2-norbornene used in many medicalpackaging and electronic applications.

We offer both standard and high-purity versions of this bicyclic olefin. It is made by the Diels-Alder reaction of cyclopentadiene and ethylene, two readily available hydrocarbons. The resulting molecule, a bicyclic olefin, is a bridged six-membered ring with a double bond on one side. The bridged ring puts extra strain on the double bond, making it highly reactive and useful in organic chemical synthesis. Reactions include ring-opening metathesis polymerization (ROMP), radical or cationic polymerization, and vinyl or addition polymerization.

Formula: C7H10

Molar mass: 94.2 g/mol

Melting point: 46°C

Boiling point: 96°C


Explore how TOPAS® COC is used across industries.


TOPAS® COC healthcare products offer sterile, reliable, and hygienic packaging solutions that ensure the integrity and safety of medical devices, pharmaceuticals, and healthcare supplies.


TOPAS® COC diagnostic products utilize precise and versatile packaging to enable accurate and efficient diagnostic tests for early detection and improved healthcare outcomes.


TOPAS® COC materials drive innovation in electronics, providing insulation, protection, and flexibility that enhance performance, miniaturization, and reliability in diverse electronic applications.

Interested in TOPAS® COC for your Business?

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Contact the TOPAS® COC Team today.

Thank you very much for your interest in TOPAS COC. You may contact us at the locations below, or via the form.

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