Hydrogen Peroxide 6% UltraPure (250ml). Hydrogen Peroxide Solution kills bacteria through oxidation.. Considered to be a safe natural effective surface sanitizer and the only germicidal agent composed of just water and oxygen.. When hydrogen peroxide reacts with organic material, it breaks down into oxygen and water and can be used to treat leg ulcers, superficial skin infections and sores that have been caused by lying or sitting in the same position for long periods of time, also known as pressure sores.. It can also be used to disinfect and cleanse the skin, or as a gargle and mouthwash solution.