1-(1-Methyl-1H-pyrazol-3-yl)ethan-1-one
Also known as: Ethanone, 1-(1-methyl-1H-pyrazol-3-yl)- (9CI), 3-Acetyl-1-methyl-1H-pyrazole, 1-(1-Methyl-1H-pyrazol-3-yl)ethanone, 1-(1-Methylpyrazol-3-yl)ethanone, 3-Acetyl-1-methylpyrazole
1-(1-Methyl-1H-pyrazol-3-yl)ethan-1-one (CAS 137890-04-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H8N2O and a molecular weight of 124.14300 g/mol. Key properties include a boiling point of 306.1±27.0 °C at 760 mmHg, a density of 1.9±0.1 g/cm3 and a flash point of 139.0±23.7 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 137890-04-1
- Jingsj CID
- J-1356781-2
- Molecular Formula
- C6H8N2O
- Molecular Weight
- 124.14300 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 306.1±27.0 °C at 760 mmHg |
|---|---|
| Density | 1.9±0.1 g/cm3 |
| Flash Point | 139.0±23.7 °C |
| Exact Mass | 249.960297 |
| PSA | 34.89000 |
| LogP | 0.38 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.662 |
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 1-(1-Methyl-1H-pyrazol-3-yl)ethan-1-one?
The CAS number of 1-(1-Methyl-1H-pyrazol-3-yl)ethan-1-one is 137890-04-1.
What are the molecular formula and molecular weight of 1-(1-Methyl-1H-pyrazol-3-yl)ethan-1-one?
1-(1-Methyl-1H-pyrazol-3-yl)ethan-1-one has molecular formula C6H8N2O and molecular weight 124.14300 g/mol.
What are the upstream and downstream products of 1-(1-Methyl-1H-pyrazol-3-yl)ethan-1-one?
For 1-(1-Methyl-1H-pyrazol-3-yl)ethan-1-one, Upstream Products: 1-Methyl-1H-pyrazole-3-carboxylic acid, 1-Methyl-1H-pyrazole-3-carbonyl chloride, 1-Methyl-1H-pyrazole-3-carbonitrile; Downstream Products: 1-(1-methyl-4-nitropyrazol-3-yl)ethanone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1-(1-Methyl-1H-pyrazol-3-yl)ethan-1-one (CAS 137890-04-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1356781-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.