Impureza Glutamyl-Glycyl-Arginine Chloromethyl Ketone (CAS 65113-67-9) | también conocida como N-{2-[(6-Carbamimidamido-1-cloro-2-oxohexan-3-yl)amino]-1-hydroxyethylidene}-alpha-glutamine o Glu-gly-arg-chloromethane | es un subproducto reactivo formado durante halogenación o quimiotransformaciones de péptidos. Su presencia como contaminante implica riesgos debido a su alta reactividad con nucleófilos y a posibles modificaciones covalentes en matrices proteicas. Presenta sensibilidad a la hidrólisis y a condiciones acuosas alcalinas. Requiere control analítico riguroso mediante LC-MS/UV y cromatografía de fase reversa para cuantificación y perfil de impurezas. Las estrategias de mitigación incluyen optimización de síntesis | purificación por HPLC y almacenamiento en frío | anhidro y bajo atmósfera inerte.
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