How does hydrogen peroxide work?

Hydrogen Peroxide is represented as H2O2 which is like water but with one extra Oxygen molecule. The catalase enzyme found in our whole body will react with the Hydrogen peroxide releasing the extra oxygen molecule in the H2O2 breaking it down to just water (H2O) and pure oxygen (O). Bacteria cannot survive in this very rich oxygen environment so they die instantly before the oxygen diffuses into the air.