5-Hexen-2-one
Also known as: Allylacetone, 3-Buten-1-yl Methyl Ketone, hex-5-en-2-one, MFCD00008793
5-Hexen-2-one (CAS 109-49-9) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C6H10O and a molecular weight of 98.143 g/mol. Key properties include a boiling point of 129.5±0.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 23.9±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H226 — Flammable liquid and vapour. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 109-49-9
- Jingsj CID
- J-1342552-0
- Molecular Formula
- C6H10O
- Molecular Weight
- 98.143 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 129.5±0.0 °C at 760 mmHg |
|---|---|
| Density | 0.8±0.1 g/cm3 |
| Flash Point | 23.9±0.0 °C |
| Exact Mass | 98.073166 |
| PSA | 17.07000 |
| LogP | 1.02 |
| Vapor Pressure | 10.1±0.2 mmHg at 25°C |
| Refractive Index | 1.409 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
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 5-Hexen-2-one?
The CAS number of 5-Hexen-2-one is 109-49-9.
What are the molecular formula and molecular weight of 5-Hexen-2-one?
5-Hexen-2-one has molecular formula C6H10O and molecular weight 98.143 g/mol.
Is 5-Hexen-2-one hazardous?
5-Hexen-2-one has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Hexen-2-one (CAS 109-49-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1342552-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.