p-Anisylhydrazine Hydrochloride (CAS 19501-58-7) | conocida también como Indomethacin Impurity 4 | es una impureza clave a monitorizar en el control de calidad farmacéutico. Su estructura contiene un anillo p-metoxi con grupo hidrazina protonado y presenta propiedades reactivas que pueden influir en la estabilidad y el perfil de degradación del principio activo. El análisis requiere caracterización analítica precisa mediante HPLC | LC-MS y RMN para confirmar identidad y cuantificar niveles residuales. Se suministran especificaciones de impureza | límites de aceptación y métodos validados para su detección | facilitando el cumplimiento regulatorio y la evaluación de riesgo durante síntesis | aislamiento y almacenamiento.
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