N | N’-Dimetil-1 | 2-fenilendiamina (CAS 3213-79-4) se identifica como impureza crítica en procesos sintéticos que involucran diaminas aromáticas. Presenta propiedades fisicoquímicas que afectan la cristalización y la solubilidad del material intermedio y puede formarse por metilación incompleta o por degradación térmica y oxidativa de precursores. Su presencia a niveles por encima de las especificaciones altera perfiles analíticos en HPLC | GC-MS y RMN y compromete la estabilidad y el rendimiento del proceso. Se recomienda control mediante métodos analíticos validados | límites aceptables definidos | medidas de estabilización y almacenamiento en condiciones controladas para minimizar su generación y garantizar cumplimiento regulatorio y calidad del lote.
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