Cirsiliol

Also known as: 6,7-Dimethoxy-3',4',5-trihydroxyflavone, 5,3',4'-Trihydroxy-6,7-dimethoxyflavone, 6,7-Dimethoxy-5,3',4'-trihydroxyflavone, Crisiliol, 2-(3,4-Dihydroxyphenyl)-5-hydroxy-6,7-dimethoxy-4H-chromen-4-one, 2-(3,4-dihydroxyphenyl)-5-hydroxy-6,7-dimethoxychromen-4-one, 3',4',5-Trihydroxy-6,7-dimethoxyflavone, 3'-Hydroxy-6-methoxygenkwanin, 4H-1-Benzopyran-4-one, 2-(3,4-dihydroxyphenyl)-5-hydroxy-6,7-dimethoxy-, 6-Hydroxyluteolin-6,7-dimethyl ether, 6-Methoxyluteolin 7-methyl ether

Cirsiliol (CAS 34334-69-5) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C17H14O7 and a molecular weight of 330.289 g/mol. Key properties include a melting point of 280-281.5℃ (methanol ), a boiling point of 616.1±55.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 230.8±25.0 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 34334-69-5
Jingsj CID: J-1979017-1
Molecular Formula: C₁₇H₁₄O₇
Molecular Weight: 330.289 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	280-281.5℃ (methanol )
Boiling Point	616.1±55.0 °C at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	230.8±25.0 °C
Exact Mass	330.073944
PSA	109.36000
LogP	2.27
Vapor Pressure	0.0±1.8 mmHg at 25°C
Refractive Index	1.671
Storage Conditions	2-8℃

GHS Safety & Compliance

IrritantSignal word: Warning

H302 — Harmful if swallowed

Activity & Biological Data

Target	Target: 5-lipoxygenase[1]
Additional Information	[1]. Mustafa EH, et al. Effects of cirsiliol, a flavone isolated from Achillea fragrantissima, on rat isolated ileum. Gen Pharmacol. 1992 May;23(3):555-60. [2]. Kang J, et al. Rhamnetin and cirsiliol induce radiosensitization and inhibition of epithelial-mesenchymal transition (EMT) by miR-34a-mediated suppression of Notch-1 expression in non-small cell lung cancer cell lines. J Biol Chem. 2013 Sep 20;288(38):27343-57.

Target

Target: 5-lipoxygenase[1]

Additional Information

[1]. Mustafa EH, et al. Effects of cirsiliol, a flavone isolated from Achillea fragrantissima, on rat isolated ileum. Gen Pharmacol. 1992 May;23(3):555-60. [2]. Kang J, et al. Rhamnetin and cirsiliol induce radiosensitization and inhibition of epithelial-mesenchymal transition (EMT) by miR-34a-mediated suppression of Notch-1 expression in non-small cell lung cancer cell lines. J Biol Chem. 2013 Sep 20;288(38):27343-57.

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 Cirsiliol?

The CAS number of Cirsiliol is 34334-69-5.

What are the molecular formula and molecular weight of Cirsiliol?

Cirsiliol has molecular formula C17H14O7 and molecular weight 330.289 g/mol.

Is Cirsiliol hazardous?

Cirsiliol has GHS signal word Warning and hazard statements H302 — Harmful if swallowed.

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. "Cirsiliol (CAS 34334-69-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1979017-1 (accessed 2026-11-09).

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