3,4-Dimethoxy-5-hydroxybenzaldehyde
3,4-Dimethoxy-5-hydroxybenzaldehyde (CAS: 29865-90-5) is a valuable organic compound with the linear formula HOC<sub>6</sub>H<sub>2</sub>(OCH<sub>3</sub>)<sub>2</sub>CHO and a molecular weight of 182.17 g/mol. It serves as a key building block and intermediate in organic synthesis. This aldehyde is widely utilised in the research and development of novel compounds, particularly within the pharmaceutical and fine chemical sectors, owing to its versatile functional groups.
- IUPAC
- 5-Hydroxyveratraldehyde
- Synonyms
- 5-HydroxyveratraldehydeHOC6H2(OCH3)2CHO

Organic Synthesis Intermediate
3,4-Dimethoxy-5-hydroxybenzaldehyde is employed as a crucial intermediate in multi-step organic synthesis pathways. Its aldehyde and hydroxyl functionalities allow for a range of chemical transformations, contributing to the construction of complex molecular architectures.
Pharmaceutical Research
This compound finds application in the synthesis of potential drug candidates and biologically active molecules. Researchers utilise it as a starting material for developing new therapeutic agents.
Fine Chemical Production
It is used in the development and manufacture of various fine chemicals. The specific arrangement of methoxy and hydroxyl groups makes it a useful synthon for targeted chemical synthesis.
| Molecular weight | 182.17 |
|---|---|
| Linear formula | HOC6H2(OCH3)2CHO |
| Assay | 98% |
| Boiling point | 177-180 °C/12 mmHg(lit.) |
| Melting point | 67-69 °C(lit.) |

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-Dimethoxy-5-hydroxybenzaldehyde used for?
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3,4-Dimethoxy-5-hydroxybenzaldehyde is primarily used as a building block and intermediate in organic synthesis, particularly in pharmaceutical research and fine chemical production.
What is the CAS number and molecular formula for 3,4-Dimethoxy-5-hydroxybenzaldehyde?
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The CAS number is 29865-90-5, and the linear formula is HOC<sub>6</sub>H<sub>2</sub>(OCH<sub>3</sub>)<sub>2</sub>CHO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3,4-Dimethoxy-5-hydroxybenzaldehyde with a minimum assay of 98%. TSS does not represent this product as USP, BP, or EP grade.
How should 3,4-Dimethoxy-5-hydroxybenzaldehyde be handled safely?
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As indicated by GHS07 and a Warning signal word, this compound may cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves, should be used. Ensure good ventilation.
How is 3,4-Dimethoxy-5-hydroxybenzaldehyde packaged and exported?
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Tech Serve Solutions professionally packages and exports fine chemicals globally, adhering to all necessary shipping regulations.
How can I request a sample or quote for 3,4-Dimethoxy-5-hydroxybenzaldehyde?
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To request a sample or a quote, please contact our sales team through the website or by phone, providing the product name and CAS number (29865-90-5).
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