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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Veratrole (1,2-Dimethoxybenzene) | CAS 91-16-7

An adjacent dimethoxy aromatic building block for veratraldehyde-related chemistry, carrying both catechol oxygens as methyl ethers and requiring clear separation from other dimethoxybenzene positional isomers.

CAS91-16-7
Molecular formulaC8H10O2
Molecular weight138.16 g/mol

Product overview

Veratrole contains two neighbouring methoxy groups rather than free phenolic hydroxyls. This gives a defined oxygen substitution pattern that can be carried into more elaborate aromatic structures. It appears in published chemistry leading to veratraldehyde, where the placement of the two ethers is part of the downstream identity. Buyers should specify the 1,2-isomer explicitly and review residual phenolic material alongside the main chromatographic peak. The names catechol dimethyl ether and pyrocatechol dimethyl ether refer to this same connectivity.

Chemical identity

Chemical name
1,2-Dimethoxybenzene (Veratrole)
CAS number
91-16-7
Molecular formula
C8H10O2
Molecular weight
138.16 g/mol

Application context

Veratraldehyde-related synthesis uses veratrole as an oxygenated aromatic precursor. Its methyl ethers preserve the paired oxygen substituents as the carbon framework is elaborated. Qualification should therefore combine structural identification with a chromatographic method capable of distinguishing the 1,3- and 1,4-isomers. When the manufacturing route starts from catechol or guaiacol, discuss their residual limits and the method used to detect them. Specify water or colour only in relation to the subsequent chemistry or final-product appearance requirements.

Chemistry and synthetic role

Two adjacent aryl methyl ethers occupy positions 1 and 2; the molecule has no phenolic OH.

Quality review

Verify the 1,2 arrangement

Check structure identification and separation from the 1,3- and 1,4-isomers.

Review residual phenols

For relevant routes, agree controls for catechol and guaiacol.

Set appearance conditions

Agree colour and physical-state observations at a stated sample temperature.

Preparing a specification

Specify veratrole/1,2-dimethoxybenzene, a GC assay with isomer resolution, route-relevant phenolic residues and application-dependent water or colour criteria.

Packaging and storage

Packaging and net weight are agreed for the selected grade, order quantity and destination. Check the actual supplier SDS and label for storage and transport requirements.

Documentation

Request a batch COA, SDS and the analytical methods for the acceptance criteria below. Confirm which supporting chromatograms and identity data are available from the selected manufacturer.

Procurement questions

Is dimethoxybenzene a complete order name?

Include the 1,2 locants or CAS because three positional isomers exist.

Why check phenolic residues?

They have free hydroxyl groups and differ from the fully methylated starting material.

Can appearance replace identity testing?

No. Spectroscopy and a suitable chromatogram establish the chemical identity.

Technical sources
  1. PubChem CID 7043NCBI / PubChem
  2. Preparation method of veratrole — CN103183588APatent publication
  3. Veratrole substance recordFDA GSRS
  4. 1,2-DimethoxybenzeneFisher Scientific