Fenilefrina Impureza 21 (CAS 2384164-93-4) é um subproduto identificado durante a síntese e degradação de fenilefrina | cuja presença pode afetar a pureza e conformidade de matérias primas e produtos acabados. A caracterização exige métodos cromatográficos e espectrométricos sensíveis | como HPLC/UPLC acoplado a LC-MS | complementados por RMN e espectroscopia IR para confirmação estrutural. Estudos de estabilidade e testes forçados elucidam vias de formação | enquanto ensaios validados permitem quantificação para controle de qualidade. A definição de limites aceitáveis | perfil de impurezas relacionadas e avaliação de risco toxicológico são essenciais para atender exigências regulatórias e garantir a integridade do produto.
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