7-Methylene-bicyclo[3.3.0]octan-2-one
7-亚甲基-双环[3.3.0]辛-2-酮
Also known as: (3aR,6aS)-5-Methylenehexahydro-1(2H)-pentalenone, 1(2H)-Pentalenone, hexahydro-5-methylene-, (3aR,6aS)-
7-Methylene-bicyclo[3.3.0]octan-2-one (CAS 84642-40-0) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C9H12O and a molecular weight of 136.191 g/mol. It is also known as (3aR,6aS)-5-Methylenehexahydro-1(2H)-pentalenone and 1(2H)-Pentalenone, hexahydro-5-methylene-, (3aR,6aS)-. Key properties include a boiling point of 217.3±9.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 82.4±13.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 84642-40-0
- Jingsj CID
- J-1528586-5
- Molecular Formula
- C9H12O
- Chinese Name
- 7-亚甲基-双环[3.3.0]辛-2-酮
- Molecular Weight
- 136.191 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 217.3±9.0 °C at 760 mmHg |
|---|---|
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 82.4±13.7 °C |
Frequently Asked Questions
What is the CAS number of 7-Methylene-bicyclo[3.3.0]octan-2-one?
The CAS number of 7-Methylene-bicyclo[3.3.0]octan-2-one is 84642-40-0.
What are the molecular formula and molecular weight of 7-Methylene-bicyclo[3.3.0]octan-2-one?
7-Methylene-bicyclo[3.3.0]octan-2-one has molecular formula C9H12O and molecular weight 136.191 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "7-Methylene-bicyclo[3.3.0]octan-2-one (CAS 84642-40-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1528586-5 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.