1,2-Cyclobutanedione
1,2-环丁二酮
Also known as: 1,2-Cyclobutandion, 1,2-cyclobutadione, Cyclobutan-1,2-dion, cyclobutane-1,2-dione, cyclobutanedione
1,2-Cyclobutanedione (CAS 33689-28-0) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C4H4O2 and a molecular weight of 84.07340 g/mol. It is also known as 1,2-Cyclobutandion, 1,2-cyclobutadione and Cyclobutan-1,2-dion. Key properties include a melting point of 65ºC, a boiling point of 155.7ºC at 760mmHg, a density of 1.314g/cm3 and a flash point of 48ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 33689-28-0
- Jingsj CID
- J-1026531-8
- Molecular Formula
- C4H4O2
- Chinese Name
- 1,2-环丁二酮
- Molecular Weight
- 84.07340 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 65ºC |
|---|---|
| Boiling Point | 155.7ºC at 760mmHg |
| Density | 1.314g/cm3 |
| Flash Point | 48ºC |
Frequently Asked Questions
What is the CAS number of 1,2-Cyclobutanedione?
The CAS number of 1,2-Cyclobutanedione is 33689-28-0.
What are the molecular formula and molecular weight of 1,2-Cyclobutanedione?
1,2-Cyclobutanedione has molecular formula C4H4O2 and molecular weight 84.07340 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,2-Cyclobutanedione (CAS 33689-28-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1026531-8 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.