7-Methoxy-3-methyl-2-phenyl-4H-chromen-4-one

Also known as: 7-Methoxy-3-methylflavone, 7-Methoxy-3-methyl-2-phenylchromen-4-one, Dimefline Impurity 2, Dimefline Impurity 5, NSC 80479

7-Methoxy-3-methyl-2-phenyl-4H-chromen-4-one (CAS 18651-16-6) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C17H14O3 and a molecular weight of 266.29100 g/mol. Key properties include a boiling point of 427.1ºC at 760mmHg, a density of 1.203g/cm3 and a flash point of 203.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 18651-16-6
Jingsj CID: J-1506146-8
Molecular Formula: C₁₇H₁₄O₃
Molecular Weight: 266.29100 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	427.1ºC at 760mmHg
Density	1.203g/cm3
Flash Point	203.9ºC
Exact Mass	266.09400
PSA	39.44000
LogP	3.77700
Vapor Pressure	1.68E-07mmHg 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-Methoxy-3-methyl-2-phenyl-4H-chromen-4-one?

The CAS number of 7-Methoxy-3-methyl-2-phenyl-4H-chromen-4-one is 18651-16-6.

What are the molecular formula and molecular weight of 7-Methoxy-3-methyl-2-phenyl-4H-chromen-4-one?

7-Methoxy-3-methyl-2-phenyl-4H-chromen-4-one has molecular formula C17H14O3 and molecular weight 266.29100 g/mol.

What are the upstream and downstream products of 7-Methoxy-3-methyl-2-phenyl-4H-chromen-4-one?

For 7-Methoxy-3-methyl-2-phenyl-4H-chromen-4-one, Upstream Products: 2'-Hydroxy-4'-methoxypropiophenone, Benzaldehyde, Benzoyl chloride; Downstream Products: 8-(Chloromethyl)-7-methoxy-3-methyl-2-phenyl-4H-chromen-4-one.

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-Methoxy-3-methyl-2-phenyl-4H-chromen-4-one (CAS 18651-16-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1506146-8 (accessed 2026-11-09).

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