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Dimethyl 2-methylenepentanedioate

Also known as: 1-Butene-2,4-dicarboxylic acid dimethyl ester, 2-METHYLENE-PENTANEDIOIC ACID DIMETHYL ESTER, 2-Methylene-pentanedioic acid dimethyl ester, 2-Methyleneglutaric acid dimethyl ester, 2-Methylene glutaric methyl ester, 2-Methylenepentanedioic acid dimethyl ester, 2-Methylidene-pentanedioic acid dimethyl ester, 4-(Methoxycarbonyl)-4-pentenoic acid methyl ester, DIMETHYL 2-METHYLENEPENTANEDIOATE, Dimethyl 2-methyleneglutarate, Dimethyl 2-methylideneglutarate, Dimethyl 2-methylidenepentanedioate, Glutaric acid, 2-methylene-, dimethyl ester, Pentanedioic acid, 2-methylene-, 1,5-dimethyl ester, Pentanedioic acid, 2-methylene-, dimethyl ester, α-[2-(Methoxycarbonyl)ethyl]acrylic acid methyl ester

Dimethyl 2-methylenepentanedioate (CAS 5621-44-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H12O4 and a molecular weight of 172.178 g/mol. Key properties include a boiling point of 190.2±15.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 82.9±18.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
5621-44-3
Jingsj CID
J-1171863-1
Molecular Formula
C8H12O4
Molecular Weight
172.178 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Boiling Point190.2±15.0 °C at 760 mmHg
Density1.1±0.1 g/cm3
Flash Point82.9±18.8 °C
Exact Mass172.073563
PSA52.60000
LogP1.49
Vapor Pressure0.5±0.4 mmHg at 25°C
Refractive Index1.433

Frequently Asked Questions

What is the CAS number of Dimethyl 2-methylenepentanedioate?

The CAS number of Dimethyl 2-methylenepentanedioate is 5621-44-3.

What are the molecular formula and molecular weight of Dimethyl 2-methylenepentanedioate?

Dimethyl 2-methylenepentanedioate has molecular formula C8H12O4 and molecular weight 172.178 g/mol.

What are the upstream and downstream products of Dimethyl 2-methylenepentanedioate?

For Dimethyl 2-methylenepentanedioate, Upstream Products: acrylic acid methyl ester, Formaldehyde; Downstream Products: 2-methylidenepentanedioic acid, 6-oxopiperidine-3-carboxylic acid, 4,4'-Methylenebis(2,6-di-tert-butylphenol).

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

Last updated:

How to cite: Jingsj. "Dimethyl 2-methylenepentanedioate (CAS 5621-44-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1171863-1 (accessed 2026-11-09).

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