A 68-year-old man with hypertension (BP 160/95 mmHg) and on aspirin for coronary artery disease presents to the emergency department with brisk epistaxis from the right nostril for the past 2 hours. Anterior rhinoscopy reveals bleeding from the anteroinferior part of the nasal septum. After initial first aid measures fail, you proceed with cauterization. Which of the following is the MOST appropriate cauterizing agent for this patient?

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