3,4,5-Trimethoxyphenol
3,4,5-Trimethoxyphenol (CAS 642-71-7), with the molecular formula (CH3O)3C6H2OH and a molecular weight of 184.19 g/mol, is a phenol derivative. It serves as a valuable building block in organic synthesis and chemical research. This compound is characterised by its methoxy and hydroxyl functional groups, enabling its participation in various chemical reactions. It is primarily used in the development of complex organic molecules.
- Synonyms
- 642-71-7(CH3O)3C6H2OH

Organic Synthesis Intermediate
3,4,5-Trimethoxyphenol acts as a key intermediate in the synthesis of more complex organic compounds. Its phenolic hydroxyl group and methoxy substituents allow for diverse chemical transformations.
Research and Development
This compound is employed in laboratory settings for research purposes, particularly in exploring new synthetic pathways and developing novel chemical entities. Its specific functional groups make it a useful starting material.
Building Block for Specialty Chemicals
It functions as a fundamental building block for the creation of various specialty chemicals. The structural features of 3,4,5-Trimethoxyphenol are leveraged in the design of molecules with targeted properties.
| Molecular weight | 184.19 |
|---|---|
| Linear formula | (CH3O)3C6H2OH |
| Assay | 97% |
| Melting point | 145-149 °C |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 3,4,5-Trimethoxyphenol used for?
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3,4,5-Trimethoxyphenol is primarily used as an intermediate in organic synthesis and as a building block in chemical research and development for creating specialty chemicals.
What is the CAS number and formula for 3,4,5-Trimethoxyphenol?
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The CAS number is 642-71-7, and its linear formula is (CH3O)3C6H2OH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3,4,5-Trimethoxyphenol with an assay of 97%. We do not represent this product as USP, BP, or EP grade.
How should 3,4,5-Trimethoxyphenol be handled safely?
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Handle 3,4,5-Trimethoxyphenol with appropriate personal protective equipment, including eyeshields, gloves, and a dust mask (type N95 or equivalent). Avoid breathing dust and ensure adequate ventilation. It is classified as a warning substance with hazards H315, H319, and H335.
Is 3,4,5-Trimethoxyphenol a controlled substance?
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The provided data does not indicate that 3,4,5-Trimethoxyphenol is a controlled substance.
How is 3,4,5-Trimethoxyphenol packed, shipped, and exported?
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Tech Serve Solutions exports fine chemicals globally. Specific packaging and shipping details are available upon request, adhering to international regulations for chemical transport.
How can I request a quote or sample of 3,4,5-Trimethoxyphenol?
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To request a quote or sample, please contact our sales team directly through the website or by phone. Provide the product name and CAS number (642-71-7) for prompt service.
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