4-Bromobenzocyclobutene
4-Bromobenzocyclobutene (CAS: 1073-39-8), with the molecular formula C8H7Br and a molecular weight of 183.05 g/mol, is a valuable organic building block. This cyclic alkene derivative serves as an intermediate in various chemical syntheses. Its structure lends itself to further functionalization, making it a key component in the development of complex organic molecules for research and industrial applications. Tech Serve Solutions supplies this compound with an assay of 96%.
- IUPAC
- 3-Bromobicyclo[4.2.0]octa-1,3,5-triene,4-Bromo-1,2-dihydrobenzocyclobutene

Organic Synthesis Intermediate
4-Bromobenzocyclobutene is utilised as a versatile intermediate in the synthesis of diverse organic compounds. Its reactive bromine atom and cyclic structure allow for a range of chemical transformations.
Building Block for Complex Molecules
The compound serves as a fundamental building block in the construction of more intricate molecular architectures. It is employed in research laboratories for the exploration of new chemical entities and materials.
Research and Development
Primarily used in R&D settings, 4-Bromobenzocyclobutene supports academic and industrial research in areas such as medicinal chemistry and materials science.
| Molecular weight | 183.05 |
|---|---|
| Empirical formula | C8H7Br |
| Assay | 96% |
| Density | 1.470 g/mL at 25 °C |
| Refractive index | n20/D 1.589 |
| Storage temperature | 2-8°C |

Hazard statements
- H302Harmful if swallowed
| Flash point | 100 °C / 212 °F |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-51 |
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 4-Bromobenzocyclobutene used for?
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4-Bromobenzocyclobutene is used as a versatile intermediate in organic synthesis and as a building block for the construction of complex organic molecules in research and development.
What are the CAS number and formula for 4-Bromobenzocyclobutene?
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The CAS number is 1073-39-8 and the molecular formula is C8H7Br.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Bromobenzocyclobutene with an assay of 96%. This is a technical/research grade material, and TSS does not represent it as USP, BP, or EP grade.
What are the safety and handling recommendations for 4-Bromobenzocyclobutene?
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4-Bromobenzocyclobutene is classified with GHS07 symbol and a 'Warning' signal word. It carries the hazard statement H302, indicating it is harmful if swallowed. Appropriate personal protective equipment should be used, and it should be handled in a well-ventilated area.
How is 4-Bromobenzocyclobutene packed, shipped, and exported?
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4-Bromobenzocyclobutene is carefully packed to ensure product integrity during transit. TSS is an experienced global supplier and exporter of fine chemicals, pharmaceutical intermediates, and laboratory reagents.
How can I request a sample or quote for 4-Bromobenzocyclobutene?
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To request a sample or a quote for 4-Bromobenzocyclobutene, please contact our sales department through the website or by phone.
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