CAS No. 850140-72-6

Batch: Purity:99.95
Afatinib (BIBW2992) Chemical Structure
Chemical Structure
Check the Afatinib (BIBW2992) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name (E)-N-[4-(3-chloro-4-fluoroanilino)-7-[(3S)-oxolan-3-yl]oxyquinazolin-6-yl]-4-(dimethylamino)but-2-enamide
CAS Number 850140-72-6
Molecular Formula

C24H25ClFN5O3

Molecular Weight (MW) 485.94
SMILES CN(C)CC=CC(=O)NC1=C(C=C2C(=C1)C(=NC=N2)NC3=CC(=C(C=C3)F)Cl)OC4CCOC4
InChIKey ULXXDDBFHOBEHA-CWDCEQMOSA-N

Ordering Information

Biological Activity

Afatinib (BIBW2992) is an irreversible tyrosine kinase inhibitor targeting EGFR wt, EGFR L858R, EGFR L858R/T790M, ErbB2, and ErbB4 (IC50 1 nM). It suppresses receptor autophosphorylation and downstream AKT and ERK signaling pathways, leading to inhibition of cellular proliferation and induction of autophagy and apoptosis in carcinoma cells.

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 97 mg/mL (199.61 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Ethanol 97 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.