Ethyl 5-oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylate
Also known as: 1-Phenyl-3-carbethoxy-5-pyrazolone, 1-Phenyl-3-ethoxycarbonyl-5-pyrazolone, 1-Phenyl-5-pyrazolone-3-carboxylic acid ethyl ester, 3-Carbethoxy-1-phenyl-2-pyrazolin-5-one, 3-Ethoxycarbonyl-1-phenyl-2-pyrazolin-5-one, Ethyl 5-oxo-1-phenyl-2-pyrazoline-3-carboxylate, 5-Oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid ethyl ester, CEP, PCEP
Ethyl 5-oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylate (CAS 89-33-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C12H12N2O3 and a molecular weight of 232.235 g/mol. Key properties include a melting point of 252ºC (Decomposes), a boiling point of 335.4±25.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 156.6±23.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 89-33-8
- Jingsj CID
- J-45064-9
- Molecular Formula
- C12H12N2O3
- Molecular Weight
- 232.235 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 252ºC (Decomposes) |
|---|---|
| Boiling Point | 335.4±25.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 156.6±23.2 °C |
| Exact Mass | 232.084793 |
| PSA | 58.97000 |
| LogP | 1.03 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.595 |
| Storage Conditions | 2-8°C |
Customs & Trade Information
| HS Code | 2933199090 |
|---|---|
| Summary | 2933199090. other compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure. 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-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylate?
The CAS number of Ethyl 5-oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylate is 89-33-8.
What are the molecular formula and molecular weight of Ethyl 5-oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylate?
Ethyl 5-oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylate has molecular formula C12H12N2O3 and molecular weight 232.235 g/mol.
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-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylate (CAS 89-33-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-45064-9 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.