Regorafenib EP Impurity B (CAS 2141961-84-2) é uma impureza relevante no perfil de qualidade de lotes de regorafenibe | associada a vias secundárias de síntese e degradação. Sua identificação e quantificação são essenciais para controle de qualidade e conformidade regulatória. Métodos analíticos validados como HPLC com detecção UV e confirmação por LC-MS permitem determinar retenção | massa e limites de especificação. Estudos de forçamento e validação de método definem critérios de aceitação | limites de quantificação e impacto potencial na pureza do ativo. Fornecemos dados analíticos detalhados e suporte para integração da Impurity B em dossiês regulatórios e controles de processo.
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