(E)-2-Nonenedioic Acid (CAS 72461-80-4) é uma impureza relevante em processos de síntese e purificação que pode afetar a qualidade de produtos finais devido à sua presença residual e à tendência a formar sais e derivados oxidados. Caracteriza-se por estabilidade térmica moderada e solubilidade limitada em solventes polares | exigindo métodos analíticos sensíveis como HPLC com detecção por UV | GC-MS para identificação de traços e RMN para confirmação estrutural. O controle inclui limites de especificação | desenvolvimento de métodos validados para quantificação | otimização de etapas de purificação e estudos de degradação forçada para estabelecer perfis de impurezas aceitáveis conforme boas práticas de controle de qualidade.
Referências
Del Rosso, James Q. “Azelaic Acid Topical Formulations: Differentiation of 15% Gel and 15% Foam.†The Journal of Clinical and Aesthetic Dermatology, vol. 10, no. 3, 1 Mar. 2017, pp. 37–40, www.ncbi.nlm.nih.gov/pmc/articles/PMC5367880/.
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