1-(3,5-Dimethyl-1H-pyrazol-4-yl)ethanone

Also known as: Ethanone,1-(3,5-dimethyl-1H-pyrazol-4-yl)-, 1-(3,5-Dimethyl-4-pyrazolyl)ethanone, 1-(3,5-dimethyl-1H-pyrazol-4-yl)ethan-1-one, 1-(3,5-dimethyl-1H-pyrazole-4-yl)acetketone, 3,5-Dimethyl-4-acetylpyrazole, 4-Acetyl-3,5-dimethylpyrazole, NSC 45012, SN 10011

1-(3,5-Dimethyl-1H-pyrazol-4-yl)ethanone (CAS 1123-48-4) 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 289.3ºC at 760mmHg, a density of 1.104g/cm3 and a flash point of 133.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1123-48-4
Jingsj CID: J-28372-7
Molecular Formula: C₇H₁₀N₂O
Molecular Weight: 138.16700 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	289.3ºC at 760mmHg
Density	1.104g/cm3
Flash Point	133.2ºC
Exact Mass	138.07900
PSA	45.75000
LogP	1.22910
Vapor Pressure	0.00221mmHg at 25°C
Refractive Index	1.527

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-(3,5-Dimethyl-1H-pyrazol-4-yl)ethanone?

The CAS number of 1-(3,5-Dimethyl-1H-pyrazol-4-yl)ethanone is 1123-48-4.

What are the molecular formula and molecular weight of 1-(3,5-Dimethyl-1H-pyrazol-4-yl)ethanone?

1-(3,5-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-(3,5-Dimethyl-1H-pyrazol-4-yl)ethanone?

For 1-(3,5-Dimethyl-1H-pyrazol-4-yl)ethanone, Upstream Products: Triacetylmethane.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "1-(3,5-Dimethyl-1H-pyrazol-4-yl)ethanone (CAS 1123-48-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-28372-7 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.