Ibuprofen EP Impurity Q (CAS 36039-35-7) es una impureza orgánica identificada como 2-(4-isobutylphenyl)ethanol | derivada del núcleo 4-isobutilfenil con grupo etanol. Su presencia se controla en el perfil de impurezas de ibuprofeno por impacto en pureza y propiedades fisicoquímicas. Se detecta y cuantifica mediante HPLC con detección UV y por LC-MS o GC-MS para confirmación estructural | complementado con RMN para verificación de identidad. Los fabricantes establecen límites de especificación y procedimientos de muestreo y almacenamiento para minimizar su formación durante síntesis y purificación. Información clave para control de calidad y cumplimiento de monografías EP y BP.
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