CAS No. 945614-12-0

Batch: Purity:99.99
Pexmetinib Chemical Structure
Chemical Structure
Check the Pexmetinib product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name 1-[3-tert-butyl-1-(4-methylphenyl)pyrazol-5-yl]-3-[[5-fluoro-2-[1-(2-hydroxyethyl)indazol-5-yl]oxyphenyl]methyl]urea
CAS Number 945614-12-0
Molecular Formula

C31H33FN6O3

Molecular Weight (MW) 556.63
SMILES CC1=CC=C(C=C1)N2C(=CC(=N2)C(C)(C)C)NC(=O)NCC3=C(C=CC(=C3)F)OC4=CC5=C(C=C4)N(N=C5)CCO
InChIKey LNMRSSIMGCDUTP-UHFFFAOYSA-N

Ordering Information

Biological Activity

Pexmetinib is a potent dual inhibitor targeting p38 MAPK and Tie-2. Inhibition of p38 MAPK suppresses stress-activated protein kinase signaling cascades, leading to reduced production of pro-inflammatory cytokines and altered downstream transcription factor activity. Concurrently, targeting the Tie-2 receptor tyrosine kinase modulates endothelial signaling pathways that regulate vascular homeostasis, angiogenesis, and cell survival phenotypes. [1][2]

How to Prepare Stock Solution?

Concentration Volume Mass
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Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
DMSO 100 mg/mL (179.65 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Ethanol 100 mg/mL
Water Insoluble
FAQ
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
  • Preheat media/saline to 37°C.
  • Mix rapidly (pipette/vortex) upon addition.
  • For complex mixes, always add the aqueous phase last.
  • Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).

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Note: Technical data last updated: Sep 1, 2026.