2-[2-(2-aminoethoxy)ethoxy]acetic acid (CAS 134978-97-5) é uma impureza polar bifuncional frequentemente detectada em processos sintéticos que envolvem etoxilação e funcionalização amina. Possui grupo amina primária e ácido carboxílico | alta solubilidade em água e tendência a formar sais com ácidos ou bases | o que pode alterar o pH e promover reações laterais. Tecnicamente | sua presença é monitorada por HPLC-MS | cromatografia iônica e RMN de prótons | onde sinais característicos de metileno adjacente a oxigênio e nitrogênio possibilitam identificação. O controle exige purificação adequada e limites analíticos definidos para evitar interferências em etapas de acoplamento e caracterização do produto final.
Referências
Zhu, Lin, et al. “Unveiling the Additive-Assisted Oriented Growth of Perovskite Crystallite for High Performance Light-Emitting Diodes.†Nature Communications, vol. 12, no. 1, Aug. 2021, https://doi.org/10.1038/s41467-021-25407-8 Wysocka, Magdalena, et al. “Pegylated Fluorescent Peptides as Substrates of Proteolytic Enzymes.†Protein & Peptide Letters, vol. 19, no. 12, Oct. 2012, pp. 1237–44, https://doi.org/10.2174/092986612803521684.
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