MW: 485.9 Da CAS Registry #: 439081-18-2 Formula: C₂₄H₂₅ClFN₅O₃ Description:Afatinib, also known as BIW-2992, is an irreversible dual inhibitor of epidermal growth factor receptor 1 (EGFR) and 2 (HER2) tyrosine kinases. Afatinib suppresses EGF-induced EGFR phosphorylation and cellular proliferation in various cell lines, including EGFR-overexpressing and HER2-expressing cell lines A431, NIH-3T3-HER2, NCI-N87 and BT-474. Synonym(s): BIW-2992 Purity:

≥95% by HPLC.

Biological Activity: Afatinib inhibited the EGFR kinase (IC50 = 15 nM) using BPS Bioscience EGFR assay performed using 10 µM ATP and 0.2 mg/ml poly-(Glu-Tyr). Activity was measured by Kinase-Glo Plus reagents (Promega). Solubility: Soluble in DMSO at 200 mg/ml; soluble in ethanol at 25 mg/ml; very poorly soluble inwater; maximum solubility in plain water is estimated to be about 50-100 µM; buffers, serum, or other additives may increase or decrease the aqueous solubility. Format: White crystalline powder. Storage / Stability: Store at or below –20°C. Solid form is stable at least 12 months from date of receipt, when stored as directed. Do not store aqueous solutions for more than one day. Reference(s): Eskens, F.A., et al. Br. J. Cancer 98: 80-85 (2008). Scientific Category: Kinase Product Type: Inhibitor Data shown is lot-specific. Contact us for specific information on other lots.

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