4',5-Dihydroxyflavone

Also known as: 5,4'-Dihydroxyflavone, 5-Hydroxy-2-(4-hydroxyphenyl)-4H-chromen-4-one, 4',5-Dihydroxyflavone

4',5-Dihydroxyflavone (CAS 6665-67-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C15H10O4 and a molecular weight of 254.238 g/mol. Key properties include a melting point of 239-240ºC, a boiling point of 486.0±45.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 190.0±22.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 6665-67-4
Jingsj CID: J-40912-1
Molecular Formula: C₁₅H₁₀O₄
Molecular Weight: 254.238 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	239-240ºC
Boiling Point	486.0±45.0 °C at 760 mmHg
Density	1.4±0.1 g/cm3
Flash Point	190.0±22.2 °C
Exact Mass	254.057907
PSA	70.67000
LogP	2.32
Vapor Pressure	0.0±1.3 mmHg at 25°C
Refractive Index	1.699
Storage Conditions	2-8℃

Activity & Biological Data

Target	Ki: 102.6 μM (LOX-1)[1]. IC50: 66 μM (α-glucosidase)[2].
Additional Information	[1]. Ribeiro D, et al. Inhibition of LOX by flavonoids: a structure-activity relationship study. Eur J Med Chem. 2014 Jan 24;72:137-45. [2]. Proença C, et al. α-Glucosidase inhibition by flavonoids: an in vitro and in silico structure-activity relationship study. J Enzyme Inhib Med Chem. 2017 Dec;32(1):1216-1228.

Customs & Trade Information

HS Code	2914501900
Summary	2914501900 other ketone-phenols。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 4',5-Dihydroxyflavone?

The CAS number of 4',5-Dihydroxyflavone is 6665-67-4.

What are the molecular formula and molecular weight of 4',5-Dihydroxyflavone?

4',5-Dihydroxyflavone has molecular formula C15H10O4 and molecular weight 254.238 g/mol.

What are the upstream and downstream products of 4',5-Dihydroxyflavone?

For 4',5-Dihydroxyflavone, Upstream Products: 2',6'-Dihydroxyacetophenone, 2-Iodoresorcinol, Methylparaben.

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. "4',5-Dihydroxyflavone (CAS 6665-67-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-40912-1 (accessed 2026-11-09).

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