![Molecular structure of ethyl 5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 926663-00-5)](/images/chem_structures_svg/279/926663-00-5.svg)
ethyl 5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate
Also known as: ethyl 5-oxo-4H-pyrazolo[1,5-a]pyrimidine-3-carboxylate, ethyl 5-hydroxypyrazolo[1,5-a]pyrimidine-3-carboxylate, ethyl 5-oxo-1H-pyrazolo[1,5-a]pyrimidine-3-carboxylate, 5-oxo-4,5-dihydro-pyrazolo[1,5-a]pyrimidine-3-carboxylic acid ethyl ester, Pyrazolo[1,5-a]pyrimidine-3-carboxylic acid, 4,5-dihydro-5-oxo-, ethyl ester
ethyl 5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 926663-00-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H9N3O3 and a molecular weight of 207.186 g/mol. Key properties include a boiling point of 339.6±42.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 159.2±27.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 926663-00-5
- Jingsj CID
- J-1505277-4
- Molecular Formula
- C9H9N3O3
- Molecular Weight
- 207.186 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 339.6±42.0 °C at 760 mmHg |
|---|---|
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 159.2±27.9 °C |
| Exact Mass | 207.064392 |
| PSA | 76.46000 |
| LogP | 1.98 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.658 |
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. 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 ethyl 5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate?
The CAS number of ethyl 5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate is 926663-00-5.
What are the molecular formula and molecular weight of ethyl 5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate?
ethyl 5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate has molecular formula C9H9N3O3 and molecular weight 207.186 g/mol.
What are the upstream and downstream products of ethyl 5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate?
For ethyl 5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate, Upstream Products: Ethyl (E)-3-ethoxyacrylate, Ethyl 3-amino-1H-pyrazole-4-carboxylate, Ethyl propiolate; Downstream Products: Ethyl 5-chloropyrazolo[1,5-a]pyrimidine-3-carboxylate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "ethyl 5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 926663-00-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1505277-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.