Ethyl 4-Chloroacetoacetate (CAS 638-07-3) es una impureza halogenada con grupo cetona y éster que puede afectar la calidad de materias primas y productos intermedios; su presencia promueve reacciones secundarias por enolización y sustitución nucleofílica | reduce rendimientos y complica el control de procesos. Se caracteriza analíticamente por GC-MS | HPLC-UV | RMN 1H/13C y espectroscopía IR | y presenta volatilidad y susceptibilidad a la hidrólisis que exigen condiciones de almacenamiento anhidras y bajas temperaturas. El control incluye especificaciones de límite de impureza | remoción por destilación fraccionada o cromatografía y monitorización continua para minimizar efectos en selectividad y seguridad del proceso.
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