Impureza relacionada ao composto Diethyl 2 | 2′-(carbonylbis(azanediyl))diacetate (CAS 7150-63-2) descrita tecnicamente como subproduto residual da etapa de acilação | apresenta polaridade moderada e maior solubilidade em solventes orgânicos | potencialmente afetando rendimento e pureza do material final; sua identificação e quantificação são tipicamente realizadas por HPLC acoplada a espectrometria de massas | GC para voláteis e RMN para confirmação estrutural. Recomenda-se controle de processo com limites de impureza definidos nas especificações do lote | geralmente abaixo de 0 | 1% | e estratégias de remoção por cromatografia de fase normal ou reversa e purificação por recristalização | além de monitoramento de estabilidade sob condições aceleradas.
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