3,4,5-Trimethoxyphenol
Also known as: Antiarol, 5-Hydroxy-1,2,3-trimethoxybenzene, 3,4,5-Trimethoxyphen, Phenol, 3,4,5-trimethoxy-
3,4,5-Trimethoxyphenol (CAS 642-71-7) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C9H12O4 and a molecular weight of 184.189 g/mol. Key properties include a melting point of 146-149 °C, a boiling point of 313.1±37.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 143.2±26.5 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 642-71-7
- Jingsj CID
- J-31156-8
- Molecular Formula
- C9H12O4
- Molecular Weight
- 184.189 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 146-149 °C |
|---|---|
| Boiling Point | 313.1±37.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 143.2±26.5 °C |
| Exact Mass | 184.073563 |
| PSA | 47.92000 |
| LogP | 1.07 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.515 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. J. S. Chauhan, et al. Constituents from Salmaliamalabaricum. Canadian Journal of Chemistry, 1980, 58(4): 328-330. |
|---|
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 3,4,5-Trimethoxyphenol?
The CAS number of 3,4,5-Trimethoxyphenol is 642-71-7.
What are the molecular formula and molecular weight of 3,4,5-Trimethoxyphenol?
3,4,5-Trimethoxyphenol has molecular formula C9H12O4 and molecular weight 184.189 g/mol.
Is 3,4,5-Trimethoxyphenol hazardous?
3,4,5-Trimethoxyphenol has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 3,4,5-Trimethoxyphenol?
For 3,4,5-Trimethoxyphenol, Upstream Products: 3,4,5-Trimethoxybenzaldehyde, 3,4,5-Trimethoxyaniline, 2,6-Dimethoxy-1,4-benzoquinone; Downstream Products: Baicalein, Oroxylin A, 2,3,4-Trimethoxy-6-hydroxyacetophenone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,4,5-Trimethoxyphenol (CAS 642-71-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31156-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.