1,2-Benzenedicarboxylic acid, 3,4-dimethoxy-

Also known as: 3,4-Dimethoxy-1,2-benzenedicarboxylic acid, 3,4-dimethoxyphthalic acid, Hemipinic acid

1,2-Benzenedicarboxylic acid, 3,4-dimethoxy- (CAS 518-90-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H10O6 and a molecular weight of 226.18300 g/mol. Key properties include a boiling point of 396.2ºC at 760mmHg, a density of 1.391g/cm3 and a flash point of 157.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 518-90-1
Jingsj CID: J-1117528-3
Molecular Formula: C₁₀H₁₀O₆
Molecular Weight: 226.18300 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	396.2ºC at 760mmHg
Density	1.391g/cm3
Flash Point	157.8ºC
Exact Mass	226.04800
PSA	93.06000
LogP	1.10020
Refractive Index	1.572

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 1,2-Benzenedicarboxylic acid, 3,4-dimethoxy-?

The CAS number of 1,2-Benzenedicarboxylic acid, 3,4-dimethoxy- is 518-90-1.

What are the molecular formula and molecular weight of 1,2-Benzenedicarboxylic acid, 3,4-dimethoxy-?

1,2-Benzenedicarboxylic acid, 3,4-dimethoxy- has molecular formula C10H10O6 and molecular weight 226.18300 g/mol.

What are the upstream and downstream products of 1,2-Benzenedicarboxylic acid, 3,4-dimethoxy-?

For 1,2-Benzenedicarboxylic acid, 3,4-dimethoxy-, Upstream Products: Carbon dioxide, Veratric acid, 2,3-dimethoxytoluene; Downstream Products: 1,2-Dimethoxybenzene, protocatechuic acid, Quinalizarin.

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. "1,2-Benzenedicarboxylic acid, 3,4-dimethoxy- (CAS 518-90-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1117528-3 (accessed 2026-11-09).

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