3-Methyl-1,2-cyclopentanedione
Also known as: 3-Methylcyclopentane-1,2-dione, Methylcyclopentenolone, Maple lactone, 2-Hydroxy-3-methyl-2-cyclopenten-1-one
3-Methyl-1,2-cyclopentanedione (CAS 765-70-8) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C6H8O2 and a molecular weight of 112.127 g/mol. Key properties include a melting point of 104-108 °C(lit.), a boiling point of 178.7±9.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 59.3±4.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 765-70-8
- Jingsj CID
- J-33992-4
- Molecular Formula
- C6H8O2
- Molecular Weight
- 112.127 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 104-108 °C(lit.) |
|---|---|
| Boiling Point | 178.7±9.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 59.3±4.4 °C |
| Exact Mass | 112.052429 |
| PSA | 34.14000 |
| LogP | 0.04 |
| Vapor Pressure | 1.0±0.3 mmHg at 25°C |
| Refractive Index | 1.463 |
| Additional Property | soluble |
Customs & Trade Information
| HS Code | 2914299000 |
|---|---|
| Summary | 2914299000. other cyclanic, cyclenic or cyclotherpenic ketones without other oxygen function. 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 3-Methyl-1,2-cyclopentanedione?
The CAS number of 3-Methyl-1,2-cyclopentanedione is 765-70-8.
What are the molecular formula and molecular weight of 3-Methyl-1,2-cyclopentanedione?
3-Methyl-1,2-cyclopentanedione has molecular formula C6H8O2 and molecular weight 112.127 g/mol.
What are the upstream and downstream products of 3-Methyl-1,2-cyclopentanedione?
For 3-Methyl-1,2-cyclopentanedione, Upstream Products: Dimethyl glutarate, Diethyl oxalate, 3-Methyl-1,2-cyclopentanediol; Downstream Products: Levulinic acid, Ethyl levulinate, 5-ethyl-2-hydroxy-3-methylcyclopent-2-en-1-one.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Methyl-1,2-cyclopentanedione (CAS 765-70-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-33992-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.