5-Methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one
Also known as: 1,2-Dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one, 1-Phenyl-3-methyl-5-pyrazolone, 1-Phenyl-3-methyl-1H-pyrazole-5(2H)-one, 2-Phenyl-5-methyl-1,2-dihydro-3H-pyrazole-3-one, 2-Phenyl-5-methyl-1H-pyrazole-3(2H)-one, 3-Methyl-1-phenyl-5-pyrazolone, Edaravone Impurity 12
5-Methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one (CAS 19735-89-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H10N2O and a molecular weight of 174.199 g/mol. Key properties include a boiling point of 276.4±23.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 121.0±22.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 19735-89-8
- Jingsj CID
- J-1075845-9
- Molecular Formula
- C10H10N2O
- Molecular Weight
- 174.199 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 276.4±23.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 121.0±22.6 °C |
| Exact Mass | 174.079315 |
| PSA | 37.79000 |
| LogP | 1.72 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.587 |
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 5-Methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one?
The CAS number of 5-Methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one is 19735-89-8.
What are the molecular formula and molecular weight of 5-Methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one?
5-Methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one has molecular formula C10H10N2O and molecular weight 174.199 g/mol.
What are the upstream and downstream products of 5-Methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one?
For 5-Methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one, Upstream Products: Ethyl acetoacetate, Phenylhydrazine, Diketene; Downstream Products: 4-Benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one, Antipyrine, 5-Chloro-3-methyl-1-phenyl-1H-pyrazole-4-carbaldehyde.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one (CAS 19735-89-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1075845-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.