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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Methyl 3,4,5-trimethoxybenzoate | CAS 1916-07-0

An aromatic methyl ester carrying a defined 3,4,5-trimethoxy pattern, used as a source of the trimethoxybenzoyl fragment in published hydrazide and hydrazone derivative synthesis.

CAS1916-07-0
Molecular formulaC11H14O5
Molecular weight226.23 g/mol

Product overview

Three methoxy groups occupy positions 3, 4 and 5 around the benzoate ring of this molecule. A separate methyl ester provides the acyl-derived site for further transformation, giving four O-methyl groups in total but no free phenolic OH. This distinction matters when comparing the material with methyl gallate or partially methylated derivatives. Published research converts methyl 3,4,5-trimethoxybenzoate into the corresponding benzohydrazide for subsequent derivative preparation. CAS 1916-07-0 should accompany the complete substitution pattern in the RFQ. Qualification should establish ester identity and methoxy placement, then address related acid or phenolic components relevant to the supplier route and the planned acyl conversion.

Chemical identity

Chemical name
Methyl 3,4,5-trimethoxybenzoate
CAS number
1916-07-0
Molecular formula
C11H14O5
Molecular weight
226.23 g/mol

Application context

A published synthesis of trimethoxybenzohydrazide analogues uses methyl 3,4,5-trimethoxybenzoate to prepare the corresponding hydrazide, which is then elaborated into substituted hydrazone derivatives. The methyl ester supplies the acyl function while the three methoxy groups remain part of the aromatic fragment. This is a research use of a defined building block. Buyers developing related compounds should focus on whether the supplied material preserves the complete 3,4,5 substitution pattern and the correct ester form. Free acid, partially demethylated substances or other ester forms are separate components with potentially different processing behaviour, so their relevance should be reviewed against the selected route.

Chemistry and synthetic role

The aromatic group bears OMe at positions 3, 4 and 5, and COOMe at position 1. The ester methyl is chemically distinct from the three aryl methoxy groups.

Quality review

Verify all three ring methoxy groups

Use structure-sensitive identification for the 3,4,5 pattern; do not identify the product merely by total methoxy content.

Distinguish ester and free acid

Agree a method that separates 3,4,5-trimethoxybenzoic acid where it is a relevant related substance.

Review phenolic related components

Consider incompletely methylated or demethylated compounds when indicated by the proposed manufacturing route.

Preparing a specification

Specify CAS 1916-07-0, methyl ester identity, the 3,4,5-trimethoxy pattern, chromatographic assay and limits for relevant acid or phenolic impurities. Define residual-solvent requirements for the intended acyl chemistry.

Packaging and storage

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

Documentation

Request a batch COA, specification, identity data and SDS. Confirm the availability of the analytical methods and any application-specific impurity results with the proposed supplier.

Procurement questions

Is this methyl gallate?

No. Methyl gallate has three phenolic OH groups; this product has three ring methoxy groups.

Does it contain an aldehyde?

No. Its carbonyl is part of a methyl ester.

Why distinguish the ester methyl from aryl methoxy groups?

They belong to different functions and are used differently during derivative synthesis.

Technical sources
  1. Methyl 3,4,5-trimethoxybenzoate T1092TCI
  2. Methyl 3,4,5-trimethoxybenzoate M86006Sigma-Aldrich
  3. Synthesis of substituted trimethoxybenzohydrazide analoguesOriental Journal of Chemistry