3-methyl-3-penten-2-one
3-甲基-3-戊烯-2-酮
Also known as: 3-methyl-3-penten-2-one, 3-methylpent-3-en-2-one, 2-acetyl-2-butene, 3-methyl-3-pentene-2-one, 3-methyl-4-oxopent-2-ene, (3E)-3-methyl-3-penten-2-one
3-methyl-3-penten-2-one (CAS 565-62-8) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C6H10O and a molecular weight of 98.14300 g/mol. It is also known as 3-methylpent-3-en-2-one, 2-acetyl-2-butene and 3-methyl-3-pentene-2-one. Key properties include a melting point of -70°C, a boiling point of 138°C, a density of 0.875 g/mL at 20 °C(lit.) and a flash point of 34°C. It is classified under GHS with signal word Warning and hazard statements H226 — Flammable liquid and vapour, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 565-62-8
- Jingsj CID
- J-1096887-9
- Molecular Formula
- C6H10O
- Chinese Name
- 3-甲基-3-戊烯-2-酮
- Molecular Weight
- 98.14300 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -70°C |
|---|---|
| Boiling Point | 138°C |
| Density | 0.875 g/mL at 20 °C(lit.) |
| Flash Point | 34°C |
| Exact Mass | 98.07320 |
| PSA | 17.07000 |
| LogP | 1.54160 |
| Refractive Index | 1.4490 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2914190090 |
|---|---|
| Summary | 2914190090 other acyclic ketones without other oxygen function。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3-methyl-3-penten-2-one?
The CAS number of 3-methyl-3-penten-2-one is 565-62-8.
What are the molecular formula and molecular weight of 3-methyl-3-penten-2-one?
3-methyl-3-penten-2-one has molecular formula C6H10O and molecular weight 98.14300 g/mol.
Is 3-methyl-3-penten-2-one hazardous?
3-methyl-3-penten-2-one has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-methyl-3-penten-2-one (CAS 565-62-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1096887-9 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.