PF-562271 besylate is a highly potent and selective focal adhesion kinase (FAK) and proline-rich tyrosine kinase 2 (Pyk2) inhibitor, widely used in oncology research and targeted drug development. With IC50 values of 1.5 nM for FAK and 14 nM for Pyk2, it effectively blocks FAK-mediated signaling pathways critical for tumor cell migration, invasion, proliferation, and survival. In cancer research, it serves as a key tool compound to study FAK/Pyk2-driven oncogenic mechanisms in breast, lung, pancreatic, and colorectal cancers. It is extensively utilized in preclinical models to evaluate anti-metastatic efficacy and synergistic potential with chemotherapy or immunotherapy. Beyond oncology, it aids in investigating FAK’s role in fibrosis, inflammation, and cardiovascular diseases. As a research-grade reagent, it supports target validation, drug resistance studies, and biomarker discovery. Its high selectivity and potency make it indispensable for elucidating FAK/Pyk2 biology and advancing targeted therapeutic strategies for unmet medical needs.

PF-562271 besylate is a bioactive small molecule with potential health hazards if mishandled. Inhalation of dust may irritate the respiratory tract, causing coughing, throat discomfort, or shortness of breath; wear a N95 respirator and ensure adequate ventilation. Skin contact may trigger irritation or allergic reactions, including redness, itching, or rash; use chemical-resistant gloves and wash skin thoroughly with soap and water after handling. Eye contact can lead to severe irritation, tearing, or conjunctivitis; flush eyes continuously with clean water for ≥15 minutes and seek immediate medical attention. Ingestion may cause nausea, vomiting, abdominal pain, or systemic toxicity; do not induce vomiting and obtain prompt medical care. Thermal decomposition releases toxic fumes (NO?, SO?, HF); avoid high temperatures and open flames. Store separately from food, feed, and incompatible substances. Dispose of waste per hazardous chemical regulations to prevent environmental contamination.