4,5-dimethyl-2-furoic acid

Also known as: 4,5-dimethylfuran-2-carboxylic acid, 4,5-dimethyl-2-furancarboxylic acid, 2,3-dimethylfuran-5-carboxylic acid, 2,3-DIMETHYLFURAN-5-CARBOXYLIC ACID, 2-Furancarboxylic acid, 4,5-dimethyl-, 4,5-Dimethyl-furan-2-carbonsaeure, 4,5-dimethylfuran-2-carboxylic acid, 4,5-dimethylfurancarboxylic acid, MFCD00085031, RARECHEM AL BE 0335

4,5-dimethyl-2-furoic acid (CAS 89639-83-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H8O3 and a molecular weight of 140.13700 g/mol. Key properties include a melting point of 146-148°C, a boiling point of 254.6ºC at 760 mmHg, a density of 1.194g/cm3 and a flash point of 107.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 89639-83-8
Jingsj CID: J-26948-7
Molecular Formula: C₇H₈O₃
Molecular Weight: 140.13700 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	146-148°C
Boiling Point	254.6ºC at 760 mmHg
Density	1.194g/cm3
Flash Point	107.8ºC
Exact Mass	140.04700
PSA	50.44000
LogP	1.59460
Refractive Index	1.51

Customs & Trade Information

HS Code	2932190090
Summary	2932190090 other compounds containing an unfused furan ring (whether or not hydrogenated) in the structure 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 4,5-dimethyl-2-furoic acid?

The CAS number of 4,5-dimethyl-2-furoic acid is 89639-83-8.

What are the molecular formula and molecular weight of 4,5-dimethyl-2-furoic acid?

4,5-dimethyl-2-furoic acid has molecular formula C7H8O3 and molecular weight 140.13700 g/mol.

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. "4,5-dimethyl-2-furoic acid (CAS 89639-83-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26948-7 (accessed 2026-11-09).

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