7,4'-Dimethoxyflavone

Also known as: 4',7-Dimethoxyflavone, 7-methoxy-2-(4-methoxyphenyl)-4H-chromen-4-one, 4H-1-Benzopyran-4-one, 7-methoxy-2-(4-methoxyphenyl)-, 7,4'-DiMethoxyflavone, Dimethyldaidzin

7,4'-Dimethoxyflavone (CAS 20979-50-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C17H14O4 and a molecular weight of 282.29100 g/mol. Key properties include a melting point of 143-144ºC, a boiling point of 452.8ºC at 760mmHg, a density of 1.242g/cm3 and a flash point of 202.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 20979-50-4
Jingsj CID: J-1401648-9
Molecular Formula: C₁₇H₁₄O₄
Molecular Weight: 282.29100 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	143-144ºC
Boiling Point	452.8ºC at 760mmHg
Density	1.242g/cm3
Flash Point	202.2ºC
Exact Mass	282.08900
PSA	48.67000
LogP	3.47720
Vapor Pressure	2.18E-08mmHg at 25°C
Refractive Index	1.598

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 7,4'-Dimethoxyflavone?

The CAS number of 7,4'-Dimethoxyflavone is 20979-50-4.

What are the molecular formula and molecular weight of 7,4'-Dimethoxyflavone?

7,4'-Dimethoxyflavone has molecular formula C17H14O4 and molecular weight 282.29100 g/mol.

What are the upstream and downstream products of 7,4'-Dimethoxyflavone?

For 7,4'-Dimethoxyflavone, Upstream Products: Paeonol, 4-Methoxybenzaldehyde, 1-Ethynyl-4-methoxybenzene; Downstream Products: 4',7-Dihydroxyflavone.

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. "7,4'-Dimethoxyflavone (CAS 20979-50-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1401648-9 (accessed 2026-11-09).

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