4,5-Dimethyloxazole
Also known as: 4,5-dimethyl-1,3-oxazole, 4,5-dimethyloxazole, Oxazole, 4,5-dimethyl-, 5-Methyl-4-methyloxazole, 4,5-Dimethyloxazol
4,5-Dimethyloxazole (CAS 20662-83-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C5H7NO and a molecular weight of 97.115 g/mol. Key properties include a melting point of 239-240 °C, a boiling point of 117.8±9.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 34.6±14.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 20662-83-3
- Jingsj CID
- J-1967824-1
- Molecular Formula
- C5H7NO
- Molecular Weight
- 97.115 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 239-240 °C |
|---|---|
| Boiling Point | 117.8±9.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 34.6±14.6 °C |
| Exact Mass | 97.052765 |
| PSA | 26.03000 |
| LogP | 1.04 |
| Vapor Pressure | 20.5±0.2 mmHg at 25°C |
| Refractive Index | 1.449 |
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 4,5-Dimethyloxazole?
The CAS number of 4,5-Dimethyloxazole is 20662-83-3.
What are the molecular formula and molecular weight of 4,5-Dimethyloxazole?
4,5-Dimethyloxazole has molecular formula C5H7NO and molecular weight 97.115 g/mol.
What are the upstream and downstream products of 4,5-Dimethyloxazole?
For 4,5-Dimethyloxazole, Upstream Products: 3-Chloro-2-butanone, Methanimidic acid, (Z)-, Potassium cyanate; Downstream Products: 4,5-Dimethylthiazole, N-(3-oxobutan-2-yl)benzamide, 4,5-Dimethyl-1H-imidazole.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4,5-Dimethyloxazole (CAS 20662-83-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1967824-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.