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

Also known as: 3',4',5',5,7-Pentamethoxyflavone, 5,7-Dimethoxy-2-(3,4,5-trimethoxyphenyl)-4H-chromen-4-one, 3',4',5,5',7-Pentamethoxyflavone, Tricetin-3',4',5',5,7-pentamethylether, 3',4',5',5,7-Pentamethoxyflavone ,98%

5,7,3',4',5'-Pentamethoxyflavone (CAS 53350-26-8) is a compound in the Ketones 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 198-200ºC, a boiling point of 554.4ºC at 760mmHg, a density of 1.244g/cm3 and a flash point of 243.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 53350-26-8
Jingsj CID: J-1972708-3
Molecular Formula: C₂₀H₂₀O₇
Molecular Weight: 372.36900 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	198-200ºC
Boiling Point	554.4ºC at 760mmHg
Density	1.244g/cm3
Flash Point	243.5ºC
Exact Mass	372.12100
PSA	76.36000
LogP	3.50300
Refractive Index	1.565
Storage Conditions	2-8°C

Activity & Biological Data

Additional Information	[1]. Hou X, et al. 3',4',5',5,7-pentamethoxyflavone sensitizes Cisplatin-resistant A549 cells to Cisplatin by inhibition of Nrf2 pathway. Mol Cells. 2015 May;38(5):396-401.

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

The CAS number of 5,7,3',4',5'-Pentamethoxyflavone is 53350-26-8.

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

5,7,3',4',5'-Pentamethoxyflavone has molecular formula C20H20O7 and molecular weight 372.36900 g/mol.

What are the upstream and downstream products of 5,7,3',4',5'-Pentamethoxyflavone?

For 5,7,3',4',5'-Pentamethoxyflavone, Upstream Products: 2'-Hydroxy-4',6'-dimethoxyacetophenone, 3,4,5-Trimethoxybenzoyl chloride, 2,4,6-Trihydroxyacetophenone; Downstream Products: 3,4,5-Trimethoxybenzoic acid.

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. "5,7,3',4',5'-Pentamethoxyflavone (CAS 53350-26-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1972708-3 (accessed 2026-11-09).

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