Ceftaroline fosamil is a fifth-generation cephalosporin antibiotic, used as an active pharmaceutical ingredient (API) in the treatment of bacterial infections. It exhibits activity against a broad spectrum of Gram-positive bacteria, including methicillin-resistant Staphylococcus aureus (MRSA), and some Gram-negative bacteria. This reagent is commonly applied in formulations for skin and soft tissue infections (e.g., cellulitis, abscesses) and community-acquired bacterial pneumonia. It functions by binding to penicillin-binding proteins, inhibiting bacterial cell wall synthesis and leading to cell lysis. As a specialty chemical, it is supplied as a powder for reconstitution and intravenous administration in clinical settings, with purity typically ≥97.5%. Its efficacy against resistant strains makes it valuable for pharmaceutical research and manufacturing of anti-infective agents.