Pentacyclo[5.4.0.02,6.03,10.05,9]undecane-8,11-dione
五环[5.4.0.02,6.03,10.05,9]十一烷-8,11-二酮
Also known as: Cookson's diketone, Cookson's dione, hexahydro-1,2,4-ethanylylidene-1H-cyclobuta[cd]pentalene-5,7(1aH)-dione, 1,2,4-Ethanylylidene-1H-cyclobuta[cd]pentalene-5,7(1aH)-dione, hexahydro-, NSC 122569, pentacyclo[5.4.0.0(2,6).0(3,10).0(5,9)]undecane-8,11-dione, pentacycloundecanedione
Pentacyclo[5.4.0.02,6.03,10.05,9]undecane-8,11-dione (CAS 2958-72-7) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C11H10O2 and a molecular weight of 174.19600 g/mol. It is also known as Cookson's diketone, Cookson's dione and hexahydro-1,2,4-ethanylylidene-1H-cyclobuta[cd]pentalene-5,7(1aH)-dione. Key properties include a melting point of 240-242ºC(lit.), a boiling point of 343.1ºC at 760 mmHg, a density of 1.552g/cm3 and a flash point of 128.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2958-72-7
- Jingsj CID
- J-49499-5
- Molecular Formula
- C11H10O2
- Chinese Name
- 五环[5.4.0.02,6.03,10.05,9]十一烷-8,11-二酮
- Molecular Weight
- 174.19600 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 240-242ºC(lit.) |
|---|---|
| Boiling Point | 343.1ºC at 760 mmHg |
| Density | 1.552g/cm3 |
| Flash Point | 128.7ºC |
Frequently Asked Questions
What is the CAS number of Pentacyclo[5.4.0.02,6.03,10.05,9]undecane-8,11-dione?
The CAS number of Pentacyclo[5.4.0.02,6.03,10.05,9]undecane-8,11-dione is 2958-72-7.
What are the molecular formula and molecular weight of Pentacyclo[5.4.0.02,6.03,10.05,9]undecane-8,11-dione?
Pentacyclo[5.4.0.02,6.03,10.05,9]undecane-8,11-dione has molecular formula C11H10O2 and molecular weight 174.19600 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Pentacyclo[5.4.0.02,6.03,10.05,9]undecane-8,11-dione (CAS 2958-72-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49499-5 (accessed 2026-10-23).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.