3,5-Dimethoxycinnamic acid

Also known as: 3,5-Dimethoxycinnamic acid, predominantly trans, 3-(3,5-Dimethoxyphenyl)acrylic acid, 2-Propenoic acid, 3-(3,5-dimethoxyphenyl)-, (E)-3-(3,5-dimethoxyphenyl)acrylic acid, 3,5-Dimethoxycinnamic acid, predominantly trans isomer, 3,5-Dimethoxycinnamic acid, 99+% predominantly trans isomer

3,5-Dimethoxycinnamic acid (CAS 16909-11-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H12O4 and a molecular weight of 208.211 g/mol. Key properties include a melting point of 174-175 °C(lit.), a boiling point of 377.1±27.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 148.5±17.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 16909-11-8
Jingsj CID: J-1503491-0
Molecular Formula: C₁₁H₁₂O₄
Molecular Weight: 208.211 g/mol
Category: Organic Acids
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	174-175 °C(lit.)
Boiling Point	377.1±27.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	148.5±17.2 °C
Exact Mass	208.073563
PSA	55.76000
LogP	2.24
Vapor Pressure	0.0±0.9 mmHg at 25°C
Refractive Index	1.574

Customs & Trade Information

HS Code	2918990090
Summary	2918990090. other carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 3,5-Dimethoxycinnamic acid?

The CAS number of 3,5-Dimethoxycinnamic acid is 16909-11-8.

What are the molecular formula and molecular weight of 3,5-Dimethoxycinnamic acid?

3,5-Dimethoxycinnamic acid has molecular formula C11H12O4 and molecular weight 208.211 g/mol.

What are the upstream and downstream products of 3,5-Dimethoxycinnamic acid?

For 3,5-Dimethoxycinnamic acid, Upstream Products: Malonic acid, 3,5-Dimethoxybenzaldehyde, Dimethyl sulfate; Downstream Products: 5,7-Dimethoxyindan-1-one, 3-(3,5-Dimethoxyphenyl)propanoic acid, 7-Hydroxy-5-methoxy-2,3-dihydro-1H-inden-1-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. "3,5-Dimethoxycinnamic acid (CAS 16909-11-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1503491-0 (accessed 2026-11-09).

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