Étil 3-amino-4-metilbenzoato (CAS 41191-92-8) es una impureza orgánica identificada en procesos sintéticos que afecta el perfil de pureza final. Su estructura aromática con grupo amino y éster etílico confiere polaridad y solubilidad moderada en disolventes orgánicos | y puede detectarse por HPLC con detección UV y por espectrometría de masas para identificación inequívoca. En control de calidad se evalúan límites de trazas | estabilidad frente a hidrólisis y oxidación | y posibles interacciones con reactivos que generen impurezas secundarias. Se recomienda validar métodos analíticos | establecer límites de especificación y monitorizar su eliminación en procesos de purificación para cumplir requisitos regulatorios.
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