Noradrenaline EP Impurity C (sal de HCl) | identificado como cloridrato de dopamina (CAS 62-31-7) | é uma impureza polar com núcleo catecolamina que exige monitorização analítica rigorosa; apresenta alta solubilidade em água e sensibilidade à oxidação por oxigênio e luz | gerando quinonas e produtos de degradação que podem comprometer ensaios de pureza. A caracterização envolve cromatografia (HPLC reverso com detecção UV e LC-MS) e espectroscopia (NMR | MS) para confirmação estrutural e quantificação. O controle efetivo inclui condições ácidas de amostragem | adição de antioxidantes | armazenamento refrigerado e validação de métodos para garantir resolução | sensibilidade e conformidade com a monografia.
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