El perfil de impurezas de Diethylenetriamine (DETA), también denominada dietilentriamina, es determinante en aplicaciones industriales; las impurezas habituales incluyen oligómeros lineales, trietilentetramina (TETA), compuestos cíclicos, agua, sales y trazas de reactivos o solventes. Estas fracciones alteran el valor amínico, la reactividad, la estabilidad térmica, el color y pueden inducir corrosión o envenenar catalizadores. El control se realiza mediante GC y GC-MS para volátiles, HPLC y RMN para perfiles orgánicos, Karl Fischer para humedad e ICP para metales. La purificación común emplea destilación fraccionada bajo vacío, extracción ácido-base e intercambio iónico para cumplir especificaciones de pureza.
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