3,3',4',5,7-Pentamethoxyflavone

Also known as: Quercetin pentamethyl ether, Pentamethylquercetin, Penta-O-methylquercetin, 2-(3,4-dimethoxyphenyl)-3,5,7-trimethoxychromen-4-one, 3,5,7,3',4'-Pentamethoxyflavone, Quercetin 3,5,7,3',4'-pentamethyl ether, 3,3',4',5,7-Pentamethoxyflavone, NSC 115922, NSC 618936

3,3',4',5,7-Pentamethoxyflavone (CAS 1247-97-8) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C20H20O7 and a molecular weight of 372.36900 g/mol. Key properties include a melting point of 152-156ºC, a boiling point of 561.9ºC at 760 mmHg, a density of 1.29 g/cm3 and a flash point of 246.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1247-97-8
Jingsj CID: J-23430-2
Molecular Formula: C₂₀H₂₀O₇
Molecular Weight: 372.36900 g/mol
Category: Ethers
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	152-156ºC
Boiling Point	561.9ºC at 760 mmHg
Density	1.29 g/cm3
Flash Point	246.9ºC
Exact Mass	372.12100
PSA	76.36000
LogP	3.50300
Vapor Pressure	1.18E-12mmHg at 25°C
Refractive Index	1.588

Activity & Biological Data

Additional Information	[1]. Takumi Horikawa, et al. Polymethoxyflavonoids from Kaempferia parviflora induce adipogenesis on 3T3-L1 preadipocytes by regulating transcription factors at an early stage of differentiation. Biol Pharm Bull. 2012;35(5):686-92.

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 3,3',4',5,7-Pentamethoxyflavone?

The CAS number of 3,3',4',5,7-Pentamethoxyflavone is 1247-97-8.

What are the molecular formula and molecular weight of 3,3',4',5,7-Pentamethoxyflavone?

3,3',4',5,7-Pentamethoxyflavone has molecular formula C20H20O7 and molecular weight 372.36900 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. "3,3',4',5,7-Pentamethoxyflavone (CAS 1247-97-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-23430-2 (accessed 2026-11-07).

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