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Ethyl 2-(hydroxyimino)-3-oxobutanoate

Also known as: Ethyl 2-(hydroxyimino)acetoacetate, Ethyl (2E)-2-(hydroxyimino)-3-oxobutanoate, Oximinoacetoacetic ester, NSC 10758, Aurora KA-158, Butyric acid, 2,3-dioxo-, ethyl ester, 2-oxime (6CI,7CI,8CI), Butyric acid, α,β-dioxo-, ethyl ester α-oxime (4CI), Ethyl (Z/E)-2-hydroxyimino-3-oxobutanoate, Ethyl 2-hydroxylimino-3-oxobutanoate, Ethyl 2-(hydroxyimino)-3-butanoate

Ethyl 2-(hydroxyimino)-3-oxobutanoate (CAS 5408-04-8) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C6H9NO4 and a molecular weight of 159.14000 g/mol. Key properties include a melting point of 46-48ºC, a boiling point of 266.1ºC at 760 mmHg, a density of 1.22g/cm3 and a flash point of 114.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
5408-04-8
Jingsj CID
J-1437138-1
Molecular Formula
C6H9NO4
Molecular Weight
159.14000 g/mol
Category
Solvents
Last updated
8/21/2026
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Physicochemical Properties

Melting Point46-48ºC
Boiling Point266.1ºC at 760 mmHg
Density1.22g/cm3
Flash Point114.7ºC
Exact Mass159.05300
PSA75.96000
Refractive Index1.476

Customs & Trade Information

HS Code2928000090
Summary2928000090 other organic derivatives of hydrazine or of hydroxylamine VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Ethyl 2-(hydroxyimino)-3-oxobutanoate?

The CAS number of Ethyl 2-(hydroxyimino)-3-oxobutanoate is 5408-04-8.

What are the molecular formula and molecular weight of Ethyl 2-(hydroxyimino)-3-oxobutanoate?

Ethyl 2-(hydroxyimino)-3-oxobutanoate has molecular formula C6H9NO4 and molecular weight 159.14000 g/mol.

What are the upstream and downstream products of Ethyl 2-(hydroxyimino)-3-oxobutanoate?

For Ethyl 2-(hydroxyimino)-3-oxobutanoate, Upstream Products: Ethyl acetoacetate, Ethyl 3-ethoxybut-2-enoate, Diethyl acetylmalonate; Downstream Products: 3,5-Dimethyl-1H-pyrrole-2,4-dicarboxylic acid, Ethyl 5-(ethoxycarbonyl)-2,4-dimethyl-1H-pyrrole-3-propionate, ethyl 3,6,6-trimethyl-4-oxo-4,5,6,7-tetrahydro-1H-indole-2-carboxylate.

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

Last updated:

How to cite: Jingsj. "Ethyl 2-(hydroxyimino)-3-oxobutanoate (CAS 5408-04-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1437138-1 (accessed 2026-11-09).

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