(2E)-3-(2,4-Dimethylphenyl)acrylic acid

Also known as: 2,4-Dimethylcinnamic acid, 3-(2,4-Dimethylphenyl)acrylic acid, (2E)-3-(2,4-dimethylphenyl)prop-2-enoic acid, 2-Propenoic acid, 3-(2,4-dimethylphenyl)-, (2E)-

(2E)-3-(2,4-Dimethylphenyl)acrylic acid (CAS 1685-80-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H12O2 and a molecular weight of 176.212 g/mol. Key properties include a melting point of 179-180ºC, a boiling point of 310.0±11.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 215.0±10.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1685-80-9
Jingsj CID: J-1418388-1
Molecular Formula: C₁₁H₁₂O₂
Molecular Weight: 176.212 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	179-180ºC
Boiling Point	310.0±11.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	215.0±10.2 °C
Exact Mass	176.083725
PSA	37.30000
LogP	3.33
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.592

Customs & Trade Information

HS Code	2916399090
Summary	2916399090 other aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of (2E)-3-(2,4-Dimethylphenyl)acrylic acid?

The CAS number of (2E)-3-(2,4-Dimethylphenyl)acrylic acid is 1685-80-9.

What are the molecular formula and molecular weight of (2E)-3-(2,4-Dimethylphenyl)acrylic acid?

(2E)-3-(2,4-Dimethylphenyl)acrylic acid has molecular formula C11H12O2 and molecular weight 176.212 g/mol.

What are the upstream and downstream products of (2E)-3-(2,4-Dimethylphenyl)acrylic acid?

For (2E)-3-(2,4-Dimethylphenyl)acrylic acid, Upstream Products: Malonic acid, 2,4-Dimethylbenzaldehyde, p-Xylene; Downstream Products: 3-(2,4-dimethylphenyl)propanoic acid.

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. "(2E)-3-(2,4-Dimethylphenyl)acrylic acid (CAS 1685-80-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1418388-1 (accessed 2026-11-09).

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