Quercetin 3,4'-dimethyl ether

Also known as: 3',5,7-Trihydroxy-3,4'-dimethoxyflavone, 5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-3-methoxy-4H-chromen-4-one, 5,7,3'-Trihydroxy-3,4'-dimethoxyflavone, 3,4'-O-dimethylquercetin, 3,4'-dimethoxy-5,7,3'-trihydroxyflavone

Quercetin 3,4'-dimethyl ether (CAS 33429-83-3) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C17H14O7 and a molecular weight of 330.29 g/mol. Key properties include a melting point of 229-230ºC, a boiling point of 607.0±55.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 227.3±25.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 33429-83-3
Jingsj CID: J-1974806-2
Molecular Formula: C₁₇H₁₄O₇
Molecular Weight: 330.29 g/mol
Category: Ethers
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	229-230ºC
Boiling Point	607.0±55.0 °C at 760 mmHg
Density	1.6±0.1 g/cm3
Flash Point	227.3±25.0 °C
Exact Mass	330.073944
PSA	109.36000
LogP	1.85
Vapor Pressure	0.0±1.8 mmHg at 25°C
Refractive Index	1.701

Activity & Biological Data

Additional Information	[1]. Toume K, et al. Cycloartane triterpenes isolated from Combretum quadrangulare in a screening program for death-receptor expression enhancing activity. J Nat Prod. 2011 Feb 25;74(2):249-55.

Customs & Trade Information

HS Code	2914509090
Summary	HS:2914509090 other ketones with other oxygen function VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Quercetin 3,4'-dimethyl ether?

The CAS number of Quercetin 3,4'-dimethyl ether is 33429-83-3.

What are the molecular formula and molecular weight of Quercetin 3,4'-dimethyl ether?

Quercetin 3,4'-dimethyl ether has molecular formula C17H14O7 and molecular weight 330.29 g/mol.

What are the upstream and downstream products of Quercetin 3,4'-dimethyl ether?

For Quercetin 3,4'-dimethyl ether, Upstream Products: Quercetin, iodomethane; Downstream Products: Quercetin, Tamarixetin, Quercetin 3,7,3',4'-tetramethyl ether.

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. "Quercetin 3,4'-dimethyl ether (CAS 33429-83-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1974806-2 (accessed 2026-11-09).

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