Carfilzomib Impurity 5 (TFA Salt) | CAS 1545469-02-0 | é uma impureza relacionada ao processo caracterizada pelo sal trifluoroacetato que altera polaridade e solubilidade em comparação ao princípio ativo. Pode originar-se por reações de salificação | decomposição ou modificações de grupo funcional durante síntese e purificação. Sua presença impacta perfil cromatográfico e pureza por HPLC e sensibilidade em LC-MS | exigindo determinação por espectrometria de massas de alta resolução e RMN para confirmação estrutural. Estratégias de controle incluem otimização de etapas reativas | lavagem seletiva | cromatografia preparativa e critérios de aceitação definidos por estabilidade. Documentação analítica robusta é essencial para conformidade regulatória.
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