7′-Methyl-1-nitroso-2′-propyl- 1H | 3’H-2 | 5′- bibenzo(d)imidazole é uma impureza nitrosada frequentemente detectada em sínteses de bibenzoimidazóis. Caracteriza-se por massa molecular compatível com adição de grupo nitroso | sinais 1H e 13C NMR deslocados aromaticamente e presença de íon característico em espectrometria de massas. Sua polaridade relativa resulta em retenção moderada em HPLC reverso e pico separado em UP-LC com detectores UV e MS. Estudos de estabilidade mostram formação por nitrosação de aminas secundárias em condições ácidas e oxidantes. Fornecemos dados de caracterização | métodos analíticos validados e protocolos de controle de qualidade para monitoramento em níveis traço durante desenvolvimento e fabricação.
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