5-[(1E)-2-(3,5-dimethoxyphenyl)ethenyl]-2-methoxyphenol

Also known as: 3,4',5-trimethoxy-3'-hydroxystilbene, (E)-3'-hydroxy-3,4',5-trimethoxystilbene, trans-3,4',5-trimethoxy-3'-hydroxystilbene, Phenol, 5-[(1E)-2-(3,5-dimethoxyphenyl)ethenyl]-2-methoxy-, 3,4',5-trimethylpiceatannol, 4,3',5'-tri-O-methylpiceatannol

5-[(1E)-2-(3,5-dimethoxyphenyl)ethenyl]-2-methoxyphenol (CAS 108957-73-9) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C17H18O4 and a molecular weight of 286.322 g/mol. Key properties include a melting point of 89 - 91ºC, a boiling point of 472.8±45.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 239.7±28.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 108957-73-9
Jingsj CID: J-993998-4
Molecular Formula: C₁₇H₁₈O₄
Molecular Weight: 286.322 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	89 - 91ºC
Boiling Point	472.8±45.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	239.7±28.7 °C
Exact Mass	286.120514
PSA	47.92000
LogP	3.81
Vapor Pressure	0.0±1.2 mmHg at 25°C
Refractive Index	1.622

Customs & Trade Information

HS Code	2909500000
Summary	2909500000 ether-phenols, ether-alcohol-phenols and their halogenated, sulphonated, nitrated or nitrosated derivatives 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-[(1E)-2-(3,5-dimethoxyphenyl)ethenyl]-2-methoxyphenol?

The CAS number of 5-[(1E)-2-(3,5-dimethoxyphenyl)ethenyl]-2-methoxyphenol is 108957-73-9.

What are the molecular formula and molecular weight of 5-[(1E)-2-(3,5-dimethoxyphenyl)ethenyl]-2-methoxyphenol?

5-[(1E)-2-(3,5-dimethoxyphenyl)ethenyl]-2-methoxyphenol has molecular formula C17H18O4 and molecular weight 286.322 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. "5-[(1E)-2-(3,5-dimethoxyphenyl)ethenyl]-2-methoxyphenol (CAS 108957-73-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-993998-4 (accessed 2026-11-09).

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