EnjayTM PRO Oxygen Cleaner works by activated oxygen. Activated oxygen is a concentrated hydrogen peroxide. Hydrogen peroxide is a germicidal agent composed only of water and oxygen. It is a very safe, natural and effective sanitizer. It has the cleaning power of bleach but without the bleaching effects. In addition, unlike bleach, it is non-toxic, biodegradable and non-corrosive. When the activated oxygen comes in contact with the stain, oxidization occurs. The cell wall of the molecule is broken. The particles are released and the stain is destroyed.