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3,4,5-Trimethoxyphenylacetic acid

Also known as: Benzeneacetic acid, 3,4,5-trimethoxy-, 2-(3,4,5-Trimethoxyphenyl)acetic acid, 3,4,5-Trimethoxybenzeneacetic acid, 3,4,5-Trimethoxyphenyl acetic acid, (3,4,5-Trimethoxyphenyl)acetic acid, MFCD00004336, EINECS 213-456-2

3,4,5-Trimethoxyphenylacetic acid (CAS 951-82-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H14O5 and a molecular weight of 226.226 g/mol. Key properties include a melting point of 117-120 °C(lit.), a boiling point of 360.8±37.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 138.1±20.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
951-82-6
Jingsj CID
J-27647-1
Molecular Formula
C11H14O5
Molecular Weight
226.226 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point117-120 °C(lit.)
Boiling Point360.8±37.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point138.1±20.0 °C
Exact Mass226.084122
PSA64.99000
LogP0.94
Vapor Pressure0.0±0.8 mmHg at 25°C
Refractive Index1.520
Additional PropertySOLUBLE

Activity & Biological Data

Additional Information[1]. Demisch L, et al. 3,4,5-Trimethoxybenzoic acid, a new mescaline metabolite in humans. Drug Metab Dispos. 1978 Sep-Oct;6(5):507-9.

Customs & Trade Information

HS Code2918990090
Summary2918990090. 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 3,4,5-Trimethoxyphenylacetic acid?

The CAS number of 3,4,5-Trimethoxyphenylacetic acid is 951-82-6.

What are the molecular formula and molecular weight of 3,4,5-Trimethoxyphenylacetic acid?

3,4,5-Trimethoxyphenylacetic acid has molecular formula C11H14O5 and molecular weight 226.226 g/mol.

What are the upstream and downstream products of 3,4,5-Trimethoxyphenylacetic acid?

For 3,4,5-Trimethoxyphenylacetic acid, Upstream Products: 3,4,5-Trimethoxyphenylacetonitrile, 3,4,5-Trimethoxybenzyl alcohol, Methyl 3,4,5-trimethoxybenzoate; Downstream Products: 2-(3,4,5-Trimethoxyphenyl)ethanol, 5-[isocyano-(4-methylphenyl)sulfonylmethyl]-1,2,3-trimethoxybenzene, (R/S)-2-(3,4,5-Trimethoxyphenyl)butyric acid.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "3,4,5-Trimethoxyphenylacetic acid (CAS 951-82-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-27647-1 (accessed 2026-11-09).

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