A impureza (S | S)-Formoterol | enantiômero S | S do formoterol | requer monitoramento analítico e controle rigoroso devido ao seu impacto potencial na pureza enantiomérica do material ativo. Originada por rota sintética concorrente ou isomerização durante processamento e armazenamento | esta impureza é caracterizada por cromatografia quiral HPLC | LC-MS/MS para identificação e RMN para confirmação estrutural. As estratégias de controle incluem otimização de etapas sintéticas | purificação específica | validação de métodos de quantificação com limites de detecção e quantificação adequados | e limiares de aceitação alinhados às diretrizes ICH para impurezas. Perfilamento contínuo e documentação de estabilidade são essenciais para garantir qualidade e conformidade regulatória.
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