3-Hydroxy-3-methylglutaric Anhydride

Also known as: 3-Hydroxy-3-methylglutaric Anhydride, 4-Hydroxy-4-methyldihydro-2H-pyran-2,6(3H)-dione, Dihydro-4-hydroxy-4-methyl-2H-pyran-2,6(3H)-dione, 4-Hydroxy-4-methyl-dihydro-pyran-2,6-dione, 4-hydroxy-4-methyloxane-2,6-dione, 3-HYDROXY-3-METHYLPENTANE-1,5-DIOIC ANHYDRIDE, Dicrotalic anhydride, AKOS 90700, 2H-Pyran-2,6(3H)-dione, dihydro-4-hydroxy-4-methyl-

3-Hydroxy-3-methylglutaric Anhydride (CAS 34695-32-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H8O4 and a molecular weight of 144.125 g/mol. Key properties include a melting point of 97-99ºC, a boiling point of 315.2±35.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 138.3±19.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 34695-32-4
Jingsj CID: J-1497884-8
Molecular Formula: C₆H₈O₄
Molecular Weight: 144.125 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	97-99ºC
Boiling Point	315.2±35.0 °C at 760 mmHg
Density	1.4±0.1 g/cm3
Flash Point	138.3±19.4 °C
Exact Mass	144.042252
PSA	63.60000
LogP	-1.47
Vapor Pressure	0.0±1.5 mmHg at 25°C
Refractive Index	1.500

Customs & Trade Information

HS Code	2918199090
Summary	2918199090 other carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 3-Hydroxy-3-methylglutaric Anhydride?

The CAS number of 3-Hydroxy-3-methylglutaric Anhydride is 34695-32-4.

What are the molecular formula and molecular weight of 3-Hydroxy-3-methylglutaric Anhydride?

3-Hydroxy-3-methylglutaric Anhydride has molecular formula C6H8O4 and molecular weight 144.125 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. "3-Hydroxy-3-methylglutaric Anhydride (CAS 34695-32-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1497884-8 (accessed 2026-11-09).

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