1-(1,5-Dimethyl-1H-pyrazol-4-yl)ethanone
Also known as: 1-(1,5-DIMETHYL-1H-PYRAZOL-4-YL)ETHANONE, 1-(1,5-dimethyl-4-pyrazolyl)ethanone, 1-(1,5-dimethylpyrazol-4-yl)ethanone, 4-Acetyl-1,5-dimethyl-pyrazol, 4-acetyl-1,5-dimethylpyrazole, Ethanone,1-(1,5-dimethyl-1H-pyrazol-4-yl)-
1-(1,5-Dimethyl-1H-pyrazol-4-yl)ethanone (CAS 21686-05-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H10N2O and a molecular weight of 138.16700 g/mol. Key properties include a boiling point of 231.8ºC at 760 mmHg, a density of 1.09g/cm3 and a flash point of 94ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 21686-05-5
- Jingsj CID
- J-1002633-2
- Molecular Formula
- C7H10N2O
- Molecular Weight
- 138.16700 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 231.8ºC at 760 mmHg |
|---|---|
| Density | 1.09g/cm3 |
| Flash Point | 94ºC |
| Exact Mass | 138.07900 |
| PSA | 34.89000 |
| LogP | 0.93110 |
| Vapor Pressure | 0.061mmHg at 25°C |
| Refractive Index | 1.536 |
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-(1,5-Dimethyl-1H-pyrazol-4-yl)ethanone?
The CAS number of 1-(1,5-Dimethyl-1H-pyrazol-4-yl)ethanone is 21686-05-5.
What are the molecular formula and molecular weight of 1-(1,5-Dimethyl-1H-pyrazol-4-yl)ethanone?
1-(1,5-Dimethyl-1H-pyrazol-4-yl)ethanone has molecular formula C7H10N2O and molecular weight 138.16700 g/mol.
What are the upstream and downstream products of 1-(1,5-Dimethyl-1H-pyrazol-4-yl)ethanone?
For 1-(1,5-Dimethyl-1H-pyrazol-4-yl)ethanone, Upstream Products: N,N-Dimethylformamide dimethyl acetal, 2,4-Pentanedione, 3-(Ethoxymethylene)pentane-2,4-dione; Downstream Products: 1,5-Dimethyl-1H-pyrazole-4-carboxylic acid.
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-(1,5-Dimethyl-1H-pyrazol-4-yl)ethanone (CAS 21686-05-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1002633-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.