4'-Chloro-2'-methylacetoacetanilide

4-氯-2-甲基-N-乙酰乙酰苯胺

Also known as: N-(4-Chloro-2-methylphenyl)-3-oxobutanamide, Acetoacet-4-chloro-2-methylanilide, 4-Chloro-2-acetoacetoluidide, 4-Chloro-o-acetoacetotoluidide, N-Acetoacetyl-4-chloro-2-methylaniline, N-Acetoacetyl-4-chloro-o-toluidine, o-Acetoacetotoluidide, 4'-chloro, 1-Acetoacetylamino-2-methyl-4-chlorobenzene, 4'-Chloro-2'-methylacetoacetanilide (alternate spelling), Acetoacet-p-chloro-o-toluidide

4'-Chloro-2'-methylacetoacetanilide (CAS 20139-55-3) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C11H12ClNO2 and a molecular weight of 225.67100 g/mol. It is also known as N-(4-Chloro-2-methylphenyl)-3-oxobutanamide, Acetoacet-4-chloro-2-methylanilide and 4-Chloro-2-acetoacetoluidide. Key properties include a melting point of 103 °C, a boiling point of 390.4ºC at 760 mmHg, a density of 1.247 g/cm3 and a flash point of 189.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
20139-55-3
Jingsj CID
J-16512-5
Molecular Formula
C11H12ClNO2
Chinese Name
4-氯-2-甲基-N-乙酰乙酰苯胺
Molecular Weight
225.67100 g/mol
Category
Organic Bases
Last updated
8/21/2026

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Physicochemical Properties

Melting Point103 °C
Boiling Point390.4ºC at 760 mmHg
Density1.247 g/cm3
Flash Point189.9ºC

Frequently Asked Questions

What is the CAS number of 4'-Chloro-2'-methylacetoacetanilide?

The CAS number of 4'-Chloro-2'-methylacetoacetanilide is 20139-55-3.

What are the molecular formula and molecular weight of 4'-Chloro-2'-methylacetoacetanilide?

4'-Chloro-2'-methylacetoacetanilide has molecular formula C11H12ClNO2 and molecular weight 225.67100 g/mol.

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

Last updated:

How to cite: Jingsj. "4'-Chloro-2'-methylacetoacetanilide (CAS 20139-55-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-16512-5 (accessed 2026-10-24).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.