Ombuin
Also known as: Quercetin 7,4'-dimethyl ether, 4',7-Dimethoxy-3,3',5-trihydroxyflavone, 3,5,3'-Trihydroxy-7,4'-dimethoxyflavone, 3,5-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-methoxy-4H-chromen-4-one, 4',7-Dimethylquercetin, 2-(3-Hydroxy-4-methoxyphenyl)-7-methoxy-3,5-dihydroxy-4H-1-benzopyran-4-one, NSC 675952
Ombuin (CAS 529-40-8) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C17H14O7 and a molecular weight of 330.289 g/mol. Key properties include a boiling point of 593.7±50.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 222.1±23.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 529-40-8
- Jingsj CID
- J-1955088-6
- Molecular Formula
- C17H14O7
- Molecular Weight
- 330.289 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 593.7±50.0 °C at 760 mmHg |
|---|---|
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 222.1±23.6 °C |
| Exact Mass | 330.073944 |
| PSA | 109.36000 |
| LogP | 2.92 |
| Vapor Pressure | 0.0±1.8 mmHg at 25°C |
| Refractive Index | 1.681 |
Activity & Biological Data
| Additional Information | [1]. Nooreen Z, et al. Characterization and evaluation of bioactive polyphenolic constituents from Zanthoxylum armatum DC., a traditionally used plant. Biomed Pharmacother. 2017 May;89:366-375. |
|---|
Customs & Trade Information
| HS Code | 2914509090 |
|---|---|
| Summary | HS:2914509090 other ketones with other oxygen function 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 Ombuin?
The CAS number of Ombuin is 529-40-8.
What are the molecular formula and molecular weight of Ombuin?
Ombuin has molecular formula C17H14O7 and molecular weight 330.289 g/mol.
What are the upstream and downstream products of Ombuin?
For Ombuin, Upstream Products: Quercetin, iodomethane, Dimethyl sulfate; Downstream Products: Quercetin 3,7,3',4'-tetramethyl ether.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Ombuin (CAS 529-40-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1955088-6 (accessed 2026-10-30).
Data for reference only; verify product details with suppliers before purchase.