Tofacitinib Impurity 118 (sal de HCl) es una impureza relacionada observada en el perfil de impurezas de tofacitinib que requiere atención técnica por su impacto potencial en la calidad farmacéutica. Se caracteriza por su formación durante etapas de síntesis o procesos de salificación y puede detectarse mediante HPLC con detección UV y confirmarse por espectrometría de masas y RMN. Su control exige límites especificados | métodos analíticos validados y estudios de estabilidad forzados para entender la cinética de degradación. La identificación | cuantificación y evaluación toxicológica de esta impureza son críticas para garantizar cumplimiento regulatorio y robustez del proceso productivo.
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