Cephalexin S-Sulfoxide (CAS 74708-55-7) é uma impureza oxidativa derivada da oxidação do átomo de enxofre da cefalexina | frequentemente monitorada em controle de qualidade de matérias-primas e lotes farmacêuticos. Esta impureza pode comprometer potência e perfil de estabilidade | apresentar retenção e espectros distintos em HPLC e LC-MS e interferir em ensaios de pureza. Métodos analíticos validados | condições de processo controladas | proteção contra agentes oxidantes e armazenamento em atmosfera inerte são estratégias para minimizar sua formação. A quantificação e limites aceitáveis devem seguir normas regulatórias e procedimentos internos de validação para garantir conformidade e segurança do produto final.
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