Nifenazone

Also known as: 1,5-Dimethyl-4-nicotinamido-2-phenyl-3-pyrazolone, 4-(Nicotinamido)antipyrine, 4-(Nicotinoylamino)antipyrine, N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)nicotinamide, Niapyrin, Nicazane, Nicodone, Nicofesone, Nicophesone, Nicophezon, Nicoreumal, Nicotazone, Phenicazone, Nicotinsäure-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-ylamid)

Nifenazone (CAS 2139-47-1) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C17H16N4O2 and a molecular weight of 308.33500 g/mol. Key properties include a melting point of 252-253° (also reported as mp 256-258°) and a density of 1.33g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2139-47-1
Jingsj CID: J-1973228-6
Molecular Formula: C₁₇H₁₆N₄O₂
Molecular Weight: 308.33500 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	252-253° (also reported as mp 256-258°)
Density	1.33g/cm3
Exact Mass	308.12700
PSA	68.92000
LogP	2.20470
Refractive Index	1.671
Storage Conditions	2-8°C

Activity & Biological Data

Additional Information	[1]. HART FD, et al. TRIAL OF NIFENAZONE ("THYLIN"). Br Med J. 1964 Jun 13;1(5397):1553-4. [2]. Bani-Yaseen AD, et al. The solvatochromic, spectral, and geometrical properties of nifenazone: a DFT/TD-DFT and experimental study. Phys Chem Chem Phys. 2014 Aug 7;16(29):15519-26.

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. 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 Nifenazone?

The CAS number of Nifenazone is 2139-47-1.

What are the molecular formula and molecular weight of Nifenazone?

Nifenazone has molecular formula C17H16N4O2 and molecular weight 308.33500 g/mol.

What are the upstream and downstream products of Nifenazone?

For Nifenazone, Upstream Products: Nicotinoyl chloride, 4-Aminoantipyrine, Nicotinoyl chloride hydrochloride; Downstream Products: Nicotinamide.

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. "Nifenazone (CAS 2139-47-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1973228-6 (accessed 2026-11-09).

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