3-Methyl-2-oxobutanoic acid

Also known as: 2-oxoisovaleric acid, 2-ketoisovaleric acid, α-ketoisovaleric acid, α-oxoisovaleric acid, dimethylpyruvic acid, isopropylglyoxylic acid, ketovaline, α-oxo-β-methylbutyric acid, α-keto-β-methylbutyric acid, 3-methyl-2-oxo-butanoic acid

3-Methyl-2-oxobutanoic acid (CAS 759-05-7) 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 170.2±9.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 71.0±15.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 759-05-7
Jingsj CID: J-1962374-6
Molecular Formula: C₅H₈O₃
Molecular Weight: 116.115 g/mol
Category: Organic Acids
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Boiling Point	170.2±9.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	71.0±15.2 °C
Exact Mass	116.047340
PSA	54.37000
LogP	-0.36
Vapor Pressure	0.7±0.7 mmHg at 25°C
Refractive Index	1.432
Storage Conditions	2-8°C

Activity & Biological Data

Target	Human Endogenous Metabolite
Additional Information	[1]. MAAS WK, et al. alpha-Ketoisovaleric acid, a precursor of pantothenic acid in Escherichia coli. J Bacteriol. 1953 Apr;65(4):388-93. [2]. Schauder P, et al. Oral administration of alpha-ketoisovaleric acid or valine in humans: blood kinetics and biochemical effects. J Lab Clin Med. 1984 Apr;103(4):597-605. [3]. Coitinho AS, et al. Pharmacological evidence that alpha-ketoisovaleric acid induces convulsions through GABAergic and glutamatergic mechanisms in rats. Brain Res. 2001 Mar 9;894(1):68-73.

Target

Human Endogenous Metabolite

Additional Information

[1]. MAAS WK, et al. alpha-Ketoisovaleric acid, a precursor of pantothenic acid in Escherichia coli. J Bacteriol. 1953 Apr;65(4):388-93. [2]. Schauder P, et al. Oral administration of alpha-ketoisovaleric acid or valine in humans: blood kinetics and biochemical effects. J Lab Clin Med. 1984 Apr;103(4):597-605. [3]. Coitinho AS, et al. Pharmacological evidence that alpha-ketoisovaleric acid induces convulsions through GABAergic and glutamatergic mechanisms in rats. Brain Res. 2001 Mar 9;894(1):68-73.

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 3-Methyl-2-oxobutanoic acid?

The CAS number of 3-Methyl-2-oxobutanoic acid is 759-05-7.

What are the molecular formula and molecular weight of 3-Methyl-2-oxobutanoic acid?

3-Methyl-2-oxobutanoic acid has molecular formula C5H8O3 and molecular weight 116.115 g/mol.

What are the upstream and downstream products of 3-Methyl-2-oxobutanoic acid?

For 3-Methyl-2-oxobutanoic acid, Upstream Products: Ethyl 3-methyl-2-oxobutanoate, 2-Ketoglutaric acid, D-Valine; Downstream Products: methyl 3-methyl-2-oxobutanoate, 2-Hydroxy-3-methylbutanoic acid, DL-Valine.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "3-Methyl-2-oxobutanoic acid (CAS 759-05-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1962374-6 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.