A impureza N-Nitroso Darolutamide Benzamida é um subproduto nitrosado crítico associado à síntese e degradação do darolutamida, exigindo monitoramento rigoroso por motivos toxicológicos e regulatórios. Quimicamente classificada como nitrosamina benzamida, pode formar-se por reações de nitrosação de intermediários amínicos em condições ácidas ou na presença de nitritos. Métodos analíticos sensíveis como LC-MS/MS, HPLC com derivatização e GC-MS são recomendados para quantificação e rastreamento em matérias primas e produtos acabados. Estratégias de controle incluem otimização de etapas sintéticas, remoção de fontes de nitrito, purificação por cromatografia e estudos de estabilidade. Definir limites de aceitação e validar métodos garante conformidade e segurança.
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