Mesityl oxide
Also known as: 4-Methyl-3-penten-2-one, 4-Methyl-3-pentene-2-one, 4-methylpent-3-en-2-one, 3-Penten-2-one, 4-methyl-, EINECS 205-502-5, MFCD00008900
Mesityl oxide (CAS 141-79-7) is a compound in the Solvents 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 melting point of −53 °C(lit.), a boiling point of 132.7±9.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 30.6±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H302 — Harmful if swallowed and H312 — Harmful in contact with skin. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 141-79-7
- Jingsj CID
- J-9040-4
- Molecular Formula
- C6H10O
- Molecular Weight
- 98.143 g/mol
- Category
- Solvents
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −53 °C(lit.) |
|---|---|
| Boiling Point | 132.7±9.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | 30.6±0.0 °C |
| Exact Mass | 98.073166 |
| PSA | 17.07000 |
| LogP | 1.12 |
| Vapor Pressure | 8.8±0.2 mmHg at 25°C |
| Refractive Index | 1.418 |
| Additional Property | 28 G/L (20 ºC) |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H302 — Harmful if swallowed
- H312 — Harmful in contact with skin
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H331 — Toxic if inhaled
- 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 Mesityl oxide?
The CAS number of Mesityl oxide is 141-79-7.
What are the molecular formula and molecular weight of Mesityl oxide?
Mesityl oxide has molecular formula C6H10O and molecular weight 98.143 g/mol.
Is Mesityl oxide hazardous?
Mesityl oxide has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H302 — Harmful if swallowed; H312 — Harmful in contact with skin.
What are the upstream and downstream products of Mesityl oxide?
For Mesityl oxide, Upstream Products: 4-Methyl-3-penten-2-ol, Phenol, 4-Methyl-4-(methylnitrosoamino)-2-pentanone; Downstream Products: 4-Methyl-4(p-tolyl)-2-pentanone, 2-Chloro-4-methylbenzaldehyde, 4-Amino-4-methyl-2-pentanol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Mesityl oxide (CAS 141-79-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-9040-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.