Isodehydroacetic acid

Also known as: 2,4-DIMETHYL-6-OXO-6H-PYRAN-3-CARBOXYLIC ACID, 2,4-dimethyl-6-oxopyran-3-carboxylic acid, 4,6-DIMETHYL-2-OXO-2H-PYRAN-5-CARBOXYLIC ACID, 5-CARBOXY-4,6-DIMETHYL-2-PYRONE, AKOS AUF02046, EINECS 207-554-4, IFLAB-BB F0918-7095, ISODEHYDRACETIC ACID, ISODEHYDROACETIC ACID, Isodehydroacetic acid, MFCD00023864, TIMTEC-BB SBB000157, isodehydroacetic acid, 2H-Pyran-5-carboxylic acid, 4,6-dimethyl-2-oxo-

Isodehydroacetic acid (CAS 480-65-9) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C8H8O4 and a molecular weight of 168.14700 g/mol. Key properties include a melting point of 154-156ºC, a boiling point of 303.4ºC at 760mmHg, a density of 1.326g/cm3 and a flash point of 125.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 480-65-9
Jingsj CID: J-24875-9
Molecular Formula: C₈H₈O₄
Molecular Weight: 168.14700 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	154-156ºC
Boiling Point	303.4ºC at 760mmHg
Density	1.326g/cm3
Flash Point	125.8ºC
Exact Mass	168.04200
PSA	67.51000
LogP	0.95480
Vapor Pressure	0.000215mmHg at 25°C
Refractive Index	1.4530 (estimate)

Customs & Trade Information

HS Code	2932209090
Summary	2932209090. other lactones. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Isodehydroacetic acid?

The CAS number of Isodehydroacetic acid is 480-65-9.

What are the molecular formula and molecular weight of Isodehydroacetic acid?

Isodehydroacetic acid has molecular formula C8H8O4 and molecular weight 168.14700 g/mol.

What are the upstream and downstream products of Isodehydroacetic acid?

For Isodehydroacetic acid, Upstream Products: Methyl 4,6-dimethyl-2-oxo-2H-pyran-5-carboxylate, Ethyl acetoacetate, Ethyl isodehydroacetate; Downstream Products: Methyl 4,6-dimethyl-2-oxo-2H-pyran-5-carboxylate, Mesityl oxide, Carbon dioxide.

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. "Isodehydroacetic acid (CAS 480-65-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-24875-9 (accessed 2026-11-10).

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