Niflumic acid

For research use only.

Catalog No.S3018

1 publication

Niflumic acid Chemical Structure

CAS No. 4394-00-7

Niflumic acid is an inhibitor of cyclooxygenase-2 used for joint and muscular pain.

Selleck's Niflumic acid has been cited by 1 publication

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Biological Activity

Description Niflumic acid is an inhibitor of cyclooxygenase-2 used for joint and muscular pain.
COX-2 [1] GABA receptor [1]
In vitro

Niflumic acid inhibits Ca2+-activated Cl- channels with inhibition constant of 17 mM. Niflumic acid also inhibits ICl(Ca) elicited by bath application of Ca2+ to oocytes permeabilized using the Ca2+ ionophore A23187, demonstrating that the inhibition of ICl(Ca) is due to a direct interaction with the Cl- channel, rather than by interference with Ca2+ entry through voltage-dependent Ca2+ channels. [1] Niflumic acid blocks Ca2+-activated non-selective cation channels in inside-out patches from the basolateral membrane of rat exocrine pancreatic cells with IC50 of 50 μM. [2] Niflumic acid dose-dependently and reversibly activates large conductance calcium-activated K+ (KCa) channels. [3] Niflumic acid produces a concentration-dependent inhibition of spontaneous transient inward current (STIC, calcium-activated chloride current) amplitude. Niflumic acid inhibits noradrenaline- and caffeine-evoked IO(Ca) with an ICM50 of 6.6 μM, less potent against evoked currents compared to spontaneous currents. Niflumic acid voltage-dependently inhibits spontaneous transient inward current (STIC) amplitude with IC50 of 2.3 μM and 1.1 μM at -50 and +50 mV respectively. [4] Niflumic acid inhibits not only IL-13-induced goblet cell hyperplasia but also airway hyperresponsiveness and eosinophilic infiltration. Niflumic suppresses the eotaxin levels in bronchoalveolar lavage fluids and overexpression of the MUC5AC gene, a marker of goblet cell hyperplasia, in the lung after IL-13 instillation. Niflumic acid suppresses JAK2 activation, STAT6 activation, and eotaxin expression in epithelial cells. [5]


Solubility (25°C)

In vitro DMSO 56 mg/mL (198.42 mM)
Water Insoluble
Ethanol Insoluble

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Chemical Information

Molecular Weight 282.22


CAS No. 4394-00-7
Storage powder
in solvent
Synonyms N/A
Smiles C1=CC(=CC(=C1)NC2=C(C=CC=N2)C(=O)O)C(F)(F)F

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID