3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one
Also known as: 1-Phenyl-3,4-dimethyl-5(4H)-pyrazolone, 1-Phenyl-3,4-dimethyl-2-pyrazolin-5-one, 2,4-Dihydro-4,5-dimethyl-2-phenyl-3H-pyrazol-3-one, 4,5-Dimethyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, 4,5-Dimethyl-2-phenyl-4H-pyrazol-3-one, 3,4-Dimethyl-1-phenyl-2-pyrazolin-5-one
3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one (CAS 17900-68-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H12N2O and a molecular weight of 188.22600 g/mol. Key properties include a boiling point of 334.5ºC at 760mmHg, a density of 1.15g/cm3 and a flash point of 156.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 17900-68-4
- Jingsj CID
- J-1517609-7
- Molecular Formula
- C11H12N2O
- Molecular Weight
- 188.22600 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 334.5ºC at 760mmHg |
|---|---|
| Density | 1.15g/cm3 |
| Flash Point | 156.1ºC |
| Exact Mass | 188.09500 |
| PSA | 32.67000 |
| LogP | 1.54580 |
| Vapor Pressure | 0.00247mmHg at 25°C |
| Refractive Index | 1.569 |
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 3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one?
The CAS number of 3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one is 17900-68-4.
What are the molecular formula and molecular weight of 3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one?
3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one has molecular formula C11H12N2O and molecular weight 188.22600 g/mol.
What are the upstream and downstream products of 3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one?
For 3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one, Upstream Products: tert-Butyl acetoacetate, Phenylhydrazine, iodomethane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one (CAS 17900-68-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1517609-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.