Leflunomide Inhouse Impurity representa una impureza observada durante la síntesis y purificación del principio activo leflunomida | cuya identificación y cuantificación son cruciales para garantizar calidad y seguridad. Esta impureza suele originarse por reacciones secundarias como hidroximetilación o degradación térmica y plantea retos analíticos en separación cromatográfica y determinación por LC-MS y RMN. El perfil de impuridad influye en la estabilidad y en la aceptabilidad del lote | por lo que se recomiendan límites de especificación basados en toxicidad y estudios de degradación forzada. Estrategias de control incluyen optimización de condiciones de síntesis | pasos de purificación adicionales y métodos analíticos validados para monitorizar niveles y tendencias.
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