Estándar de referencia Sodium Ethyl Parahydroxybenzoate, CAS 35285-68-8, presentado con especificaciones metrológicas y certificado de análisis que documenta pureza determinada por HPLC y verificación de identidad mediante NMR y espectrometría de masas; incluye valor certificado, incertidumbre expandida y trazabilidad metrológica. Se proporcionan resultados de contenido de agua por Karl Fischer, perfil de impurezas relacionadas y punto de fusión cuando procede. El material cumple criterios de homogeneidad y estabilidad por lote, viene en envases etiquetados con número de lote y fecha de caducidad y se entrega con recomendaciones de almacenamiento para mantener integridad analítica.
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