4,5-Dimethoxycatechol

Also known as: 4,5-Dimethoxycatechol, 4,5-Dimethoxybenzene-1,2-diol, 1,2-Benzenediol, 4,5-dimethoxy-, 1,2-Dihydroxy-4,5-dimethoxybenzene, 4,5-Dimethoxypyrocatechol, Phloroglucinol Impurity 31

4,5-Dimethoxycatechol (CAS 1664-27-3) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C8H10O4 and a molecular weight of 170.16300 g/mol. Key properties include a boiling point of 354.1ºC at 760 mmHg, a density of 1.267 g/cm3 and a flash point of 168ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1664-27-3
Jingsj CID: J-1974782-1
Molecular Formula: C₈H₁₀O₄
Molecular Weight: 170.16300 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	354.1ºC at 760 mmHg
Density	1.267 g/cm3
Flash Point	168ºC
Exact Mass	170.05800
PSA	58.92000
LogP	1.11500
Vapor Pressure	1.68E-05mmHg at 25°C
Refractive Index	1.559

Customs & Trade Information

HS Code	2909500000
Summary	2909500000 ether-phenols, ether-alcohol-phenols and their halogenated, sulphonated, nitrated or nitrosated derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 4,5-Dimethoxycatechol?

The CAS number of 4,5-Dimethoxycatechol is 1664-27-3.

What are the molecular formula and molecular weight of 4,5-Dimethoxycatechol?

4,5-Dimethoxycatechol has molecular formula C8H10O4 and molecular weight 170.16300 g/mol.

What are the upstream and downstream products of 4,5-Dimethoxycatechol?

For 4,5-Dimethoxycatechol, Upstream Products: Sodium methoxide, 4,5-Dimethoxy-1,2-benzoquinone; Downstream Products: 1,2,4,5-Tetramethoxybenzene, Ilimaquinone, 2,5-Dimethoxy-1,4-benzoquinone.

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. "4,5-Dimethoxycatechol (CAS 1664-27-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1974782-1 (accessed 2026-11-09).

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