Quercetin 3,7,3',4'-tetramethyl ether

Also known as: Retusin, 3,3',4',7-Tetramethylquercetin, 3,7,3',4'-Tetra-O-methylquercetin, 5-Hydroxy-3,3',4',7-tetramethoxyflavone, 2-(3,4-Dimethoxyphenyl)-5-hydroxy-3,7-dimethoxy-4H-chromen-4-one, Quercetin 3,3',4',7-O-tetramethyl ether, QUERCETIN-3,7,3',4'-TETRAMETHYL ETHER, QUERCETINTETRAMETHYLETHER, NSC 61837, NSC 618937, Einecs 214-991-4

Quercetin 3,7,3',4'-tetramethyl ether (CAS 1245-15-4) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C19H18O7 and a molecular weight of 358.34200 g/mol. Key properties include a melting point of 156-161ºC, a boiling point of 569.2ºC at 760mmHg, a density of 1.36g/cm3 and a flash point of 205.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1245-15-4
Jingsj CID: J-4322-1
Molecular Formula: C₁₉H₁₈O₇
Molecular Weight: 358.34200 g/mol
Category: Ethers
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	156-161ºC
Boiling Point	569.2ºC at 760mmHg
Density	1.36g/cm3
Flash Point	205.6ºC
Exact Mass	358.10500
PSA	87.36000
LogP	3.20000
Vapor Pressure	1.48E-13mmHg at 25°C
Refractive Index	1.617

Activity & Biological Data

Additional Information	[1]. Ga-Eun Lee, et al. Antiviral activities of hydroxylated flavones on feline foamy viral proliferation. Appl Biol Chem. 2017 Jul.

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 3,7,3',4'-tetramethyl ether?

The CAS number of Quercetin 3,7,3',4'-tetramethyl ether is 1245-15-4.

What are the molecular formula and molecular weight of Quercetin 3,7,3',4'-tetramethyl ether?

Quercetin 3,7,3',4'-tetramethyl ether has molecular formula C19H18O7 and molecular weight 358.34200 g/mol.

What are the upstream and downstream products of Quercetin 3,7,3',4'-tetramethyl ether?

For Quercetin 3,7,3',4'-tetramethyl ether, Upstream Products: Quercetin, Dimethyl sulfate, iodomethane; Downstream Products: Veratric acid, 5-Methoxyresorcinol, 3,3',4',5,7-Pentamethoxyflavone.

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 3,7,3',4'-tetramethyl ether (CAS 1245-15-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-4322-1 (accessed 2026-11-07).

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