trans-2,3,4-Trimethoxycinnamic acid

Also known as: (2E)-3-(2,3,4-Trimethoxyphenyl)acrylic acid, (E)-3-(2,3,4-trimethoxyphenyl)-2-propenoic acid, 2,3,4-Trimethoxy-trans-cinnamic acid, 2,3,4-Trimethoxyzimtsaeure, 2-Propenoic acid, 3-(2,3,4-trimethoxyphenyl)-, (2E)-, 3-(2,3,4-Trimethoxyphenyl)acrylic acid, trans-2,3,4-Trimethoxycinnamic acid

trans-2,3,4-Trimethoxycinnamic acid (CAS 33130-03-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H14O5 and a molecular weight of 238.237 g/mol. Key properties include a melting point of 172-174 °C, a boiling point of 392.2±37.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 149.7±20.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 33130-03-9
Jingsj CID: J-1993923-2
Molecular Formula: C₁₂H₁₄O₅
Molecular Weight: 238.237 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	172-174 °C
Boiling Point	392.2±37.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	149.7±20.0 °C
Exact Mass	238.084122
PSA	64.99000
LogP	2.03
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.560

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 trans-2,3,4-Trimethoxycinnamic acid?

The CAS number of trans-2,3,4-Trimethoxycinnamic acid is 33130-03-9.

What are the molecular formula and molecular weight of trans-2,3,4-Trimethoxycinnamic acid?

trans-2,3,4-Trimethoxycinnamic acid has molecular formula C12H14O5 and molecular weight 238.237 g/mol.

What are the upstream and downstream products of trans-2,3,4-Trimethoxycinnamic acid?

For trans-2,3,4-Trimethoxycinnamic acid, Upstream Products: Malonic acid, 2,3,4-Trimethoxybenzaldehyde.

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. "trans-2,3,4-Trimethoxycinnamic acid (CAS 33130-03-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993923-2 (accessed 2026-11-09).

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