Methyl 2-oxobutanoate
Also known as: Methyl 2-ketobutyrate, Methyl 2-oxobutyrate, 2-Oxobutanoic acid methyl ester, 2-Oxobutyric acid methyl ester, 2-Ketobutyric acid methyl ester, Butanoic acid, 2-oxo-, methyl ester
Methyl 2-oxobutanoate (CAS 3952-66-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H8O3 and a molecular weight of 116.115 g/mol. Key properties include a boiling point of 146.9±9.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 50.6±15.9 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H319 — Causes serious eye irritation and H334 — May cause allergy or asthma symptoms if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 3952-66-7
- Jingsj CID
- J-1477611-5
- Molecular Formula
- C5H8O3
- Molecular Weight
- 116.115 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 146.9±9.0 °C at 760 mmHg |
|---|---|
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 50.6±15.9 °C |
| Exact Mass | 116.047340 |
| PSA | 43.37000 |
| LogP | 0.05 |
| Vapor Pressure | 4.5±0.3 mmHg at 25°C |
| Refractive Index | 1.399 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H319 — Causes serious eye irritation
- H334 — May cause allergy or asthma symptoms if inhaled
Customs & Trade Information
| HS Code | 2918300090 |
|---|---|
| Summary | 2918300090 other carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Methyl 2-oxobutanoate?
The CAS number of Methyl 2-oxobutanoate is 3952-66-7.
What are the molecular formula and molecular weight of Methyl 2-oxobutanoate?
Methyl 2-oxobutanoate has molecular formula C5H8O3 and molecular weight 116.115 g/mol.
Is Methyl 2-oxobutanoate hazardous?
Methyl 2-oxobutanoate has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H319 — Causes serious eye irritation; H334 — May cause allergy or asthma symptoms if inhaled.
What are the upstream and downstream products of Methyl 2-oxobutanoate?
For Methyl 2-oxobutanoate, Upstream Products: 2-Oxobutanoic acid, Methyl 3-oxovalerate, Dimethyl oxalate; Downstream Products: Methyl 3-bromo-2-oxobutanoate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methyl 2-oxobutanoate (CAS 3952-66-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1477611-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.