1-Bromobenzocyclobutene
Also known as: 1-Bromobenzocyclobutene, 1-BrBCB, 1-bromo-1,2-dihydrobenzocyclobutene, 1-bromo-1,2-dihydro-cyclobutabenzene, 1-bromobenzocyclobutane, 1-bromocyclobutabenzene, 7-Bromobicyclo[4.2.0]octa-1,3,5,7-tetraene, 7-bromobicyclo[4.2.0]octa-1,3,5-triene, AC-154, Benzocyclobutenyl bromide, Bicyclo[4.2.0]octa-1,3,5-triene, 7-bromo-
1-Bromobenzocyclobutene (CAS 21120-91-2) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H7Br and a molecular weight of 183.04800 g/mol. Key properties include a boiling point of 90ºC10.5 mm Hg(lit.), a density of 1.45 g/mL at 25ºC(lit.) and a flash point of 96.1 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 21120-91-2
- Jingsj CID
- J-40255-1
- Molecular Formula
- C8H7Br
- Molecular Weight
- 183.04800 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 90ºC10.5 mm Hg(lit.) |
|---|---|
| Density | 1.45 g/mL at 25ºC(lit.) |
| Flash Point | 96.1 °C |
| Exact Mass | 179.95700 |
| LogP | 2.89300 |
| Vapor Pressure | 0.168mmHg at 25°C |
| Refractive Index | n20/D 1.59(lit.) |
Customs & Trade Information
| HS Code | 2903890090 |
|---|---|
| Summary | 2903890090. halogenated derivatives of cyclanic, cyclenic or cyclotherpenic hydrocarbons. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 1-Bromobenzocyclobutene?
The CAS number of 1-Bromobenzocyclobutene is 21120-91-2.
What are the molecular formula and molecular weight of 1-Bromobenzocyclobutene?
1-Bromobenzocyclobutene has molecular formula C8H7Br and molecular weight 183.04800 g/mol.
What are the upstream and downstream products of 1-Bromobenzocyclobutene?
For 1-Bromobenzocyclobutene, Upstream Products: Bromoform, Cycloheptatriene, Benzocyclobutene; Downstream Products: 1-Benzocyclobutenecarbonitrile, Benzocyclobutenone, Bicyclo[4.2.0]octa-1,3,5-trien-7-ol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1-Bromobenzocyclobutene (CAS 21120-91-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-40255-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.