Bicyclo[2.2.1]hepta-2,5-diene
Bicyclo[2.2.1]hepta-2,5-diene (CAS: 121-46-0), also known as 2,5-Norbornadiene or NBD, is an organic compound with a molecular weight of 92.14 g/mol. This alicyclic alkene serves as a key building block in organic synthesis. Its unique structure makes it valuable in polymer science and as an intermediate in the synthesis of complex molecules, notably prostaglandins. Tech Serve Solutions supplies this chemical for research and development purposes.
- IUPAC
- 2,5-Norbornadiene,NBD
- Synonyms
- 2,5-NorbornadieneNBDBicyclo[2.2.1]hept-2,5-diene2,5-Bicyclo[2.2.1]heptadieneCyclohexa-1,4-diene, bridged
![Bicyclo[2.2.1]hepta-2,5-diene (C7H8) — chemical structure, CAS 121-46-0; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F121-46-0.png&w=3840&q=75)
Prostaglandin Synthesis Intermediate
Bicyclo[2.2.1]hepta-2,5-diene is a crucial intermediate in the synthesis of prostaglandins, a group of biologically active lipid compounds. Its chemical structure facilitates the necessary stereochemical control required for these complex syntheses.
Monomer for Specialty Polymers
As a norbornene monomer, this compound can be polymerised to create materials with specific properties, such as etch resistance. These polymers find applications in advanced materials science and microelectronics manufacturing.
Organic Synthesis Building Block
The diene functionality and bicyclic structure make Bicyclo[2.2.1]hepta-2,5-diene a versatile building block in various organic reactions. It is frequently employed in Diels-Alder reactions and other cycloadditions.
| Molecular weight | 92.14 |
|---|---|
| Empirical formula | C7H8 |
| Assay | ≥95.0% (GC) |
| Boiling point | 89 °C(lit.) |
| Density | 0.906 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.470(lit.)n20/D 1.470 |
| Contains / stabiliser | 0.05-0.25% BHT as inhibitor |
| Application | Intermediate in prostaglandin synthesis.1 |

Hazard statements
- H225Highly flammable liquid and vapour
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | -21 °C / -5.8 °F |
| Transport (UN / ADR) | UN 2251 3 / PGII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | F |
| Risk statements (R) | 11 |
| Safety statements (S) | 16 |
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 Bicyclo[2.2.1]hepta-2,5-diene used for?
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Bicyclo[2.2.1]hepta-2,5-diene is primarily used as an intermediate in prostaglandin synthesis and as a monomer for specialty polymers, particularly in areas like etch-resistant materials and microelectronics. It also serves as a versatile building block in general organic synthesis.
What are the CAS number and molecular formula for Bicyclo[2.2.1]hepta-2,5-diene?
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The CAS number for Bicyclo[2.2.1]hepta-2,5-diene is 121-46-0. The empirical formula is C7H8, and its molecular weight is 92.14 g/mol.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Bicyclo[2.2.1]hepta-2,5-diene with an assay of ≥95.0% (GC). This product is suitable for research and laboratory applications and is not supplied as USP, BP, EP, or pharmaceutical grade unless explicitly stated.
How should Bicyclo[2.2.1]hepta-2,5-diene be handled safely?
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Bicyclo[2.2.1]hepta-2,5-diene is a highly flammable liquid and vapour (H225). Handle it in a well-ventilated area, away from ignition sources. Appropriate personal protective equipment, including eyeshields, gloves, and respiratory protection, is essential. Consult the Safety Data Sheet (SDS) for comprehensive safety information.
Is Bicyclo[2.2.1]hepta-2,5-diene controlled or regulated?
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The provided data indicates UN 2251 (Flammable liquid) and WGK Germany 2 classification. It is not explicitly listed as a controlled substance in the provided data.
How is Bicyclo[2.2.1]hepta-2,5-diene shipped and exported?
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Bicyclo[2.2.1]hepta-2,5-diene is shipped as a flammable liquid (UN 2251, Packing Group II). Tech Serve Solutions is experienced in exporting chemicals globally, adhering to all relevant international shipping and customs regulations.
How can I request a sample or quote for Bicyclo[2.2.1]hepta-2,5-diene?
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To request a sample or obtain a quote, please contact our sales team through the website or by phone. Provide the product name and CAS number (121-46-0) for prompt service.
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