Impureza: ftalato de dietila (Diethyl Phthalate | CAS 84-66-2) é comumente detectado como traço em matérias-primas e solventes | apresentando baixa volatilidade e alta lipofilicidade que favorece migração em matrizes orgânicas. Em controle analítico é quantificado por cromatografia gasosa acoplada à espectrometria de massas GC-MS ou por GC-FID após extração por SPE. A presença pode afetar especificações toxicológicas e de migração | exigindo limiares de aceitação e estratégias de purificação como destilação a vácuo e adsorção em sílica. Recomenda-se monitoramento contínuo | validação de métodos e armazenamento em condições anidras e refrigeradas para minimizar formação e estabilidade da impureza.
Referências
Alfaro, Robert A., and Donald D. Davis. “Diclofenac.†Nih.gov, StatPearls Publishing, 3 June 2021, www.ncbi.nlm.nih.gov/books/NBK557879/. ‌
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