Dicyclopentadiene dioxide, mixture of endo and exo isomers
Dicyclopentadiene dioxide (CAS 81-21-0), a mixture of endo and exo isomers with the molecular formula C10H12O2, is a reactive diepoxide. It serves as a key building block in polymer science and materials science. Its difunctional epoxide groups allow for versatile polymerisation and cross-linking reactions, making it valuable in the synthesis of various resins, coatings, and advanced materials. Offered by TSS at 97% purity.
- IUPAC
- Dicyclopentadiene diepoxide
- Synonyms
- Dicyclopentadiene diepoxide9,10-Epoxy-1,4,7,8-tetrahydronaphthalene oxide, mixture of endo and exo isomers

Monomer for Polymer Synthesis
This diepoxide can undergo ring-opening polymerisation, contributing to the formation of novel polymer backbones with specific thermal and mechanical properties.
Cross-linking Agent
Its epoxide functionalities make it an effective cross-linking agent for various polymer systems, enhancing network formation and improving material performance.
Resin and Coating Formulations
Utilised in the development of specialised epoxy resins and coatings, providing improved adhesion, chemical resistance, and durability.
Materials Science Intermediate
A useful intermediate in materials science for synthesising complex organic structures and functional materials.
| Molecular weight | 164.20 |
|---|---|
| Empirical formula | C10H12O2 |
| Assay | 97% |
| Melting point | 185-189 °C(lit.) |

Hazard statements
- H301Toxic if swallowed
- H319Causes serious eye irritation
Precautionary statements
- P301IF SWALLOWED
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Dicyclopentadiene dioxide used for?
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Dicyclopentadiene dioxide (CAS 81-21-0) is primarily used as a monomer in polymer synthesis and as a cross-linking agent in various formulations within materials science and polymer science applications.
What is the CAS number and formula for Dicyclopentadiene dioxide?
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The CAS number for Dicyclopentadiene dioxide is 81-21-0, and its empirical formula is C10H12O2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Dicyclopentadiene dioxide with an assay of 97%. This product is not represented as USP, BP, EP, or any other pharmacopoeia grade.
How should Dicyclopentadiene dioxide be handled?
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Dicyclopentadiene dioxide is a hazardous substance. Handle with appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, face shields, and gloves. Avoid ingestion and eye contact. Follow precautionary statements P301 + P310 and P305 + P351 + P338.
Is Dicyclopentadiene dioxide subject to any special regulations?
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According to the provided safety data, Dicyclopentadiene dioxide is classified under UN 2811, hazard class 6.1, Packing Group III, indicating it is a toxic solid, organic, n.o.s.
How is this chemical packed and shipped?
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Dicyclopentadiene dioxide is shipped as a toxic solid (UN 2811, 6.1/PGIII). Specific packing details for export can be provided upon request.
How can I request a sample or quote?
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To request a sample or a quote for Dicyclopentadiene dioxide, please contact our sales team through the website or by phone, referencing the product CAS number 81-21-0.
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