Temozolomide EP Impurity B (Temozolomide Acid) | CAS 113942-30-6 | é uma impureza de degradação ácida do princípio ativo que requer monitoramento rigoroso em controles analíticos. Quimicamente caracterizada por aumento de polaridade e massa correspondente ao análogo ácido | esta impureza é detectável por HPLC com detecção UV | confirmável por LC-MS e NMR para identificação estrutural. Sua presença pode indicar hidrólise ou condições de armazenamento inadequadas | afetando pureza e estabilidade do lote. Estratégias analíticas incluem limites de especificação | testes indicativos de estabilidade e procedimentos de limpeza validados para minimizar formação e garantir conformidade com farmacopéias.
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