Apramycin sulfate (CAS 41194-16-5, C21H43N5O15S), is a white to off-white powder, widely used in veterinary medicine as an antibiotic for the treatment of bacterial infections in animals. It is primarily used to combat Gram-negative bacteria, including strains resistant to other antibiotics. Apramycin sulfate exhibits a broad spectrum of activity and is particularly effective against Enterobacteriaceae and Pseudomonas aeruginosa. Due to its low toxicity and minimal impact on the normal gut flora, it is considered a safe and effective treatment option. Apramycin sulfate plays a crucial role in animal health and contributes to the prevention and control of bacterial diseases in livestock.