Hydrogen peroxide also known as H202 is the peroxide. Hydrogen peroxide is made up of 2 hydrogen atom and 2 oxygen atoms. H2O2 is a strong oxidizer and considered as a highly reactive oxygen species. Its strong oxidizing propeties make it useful as a bleach or cleaning agent.
It is the only germicidal agent that is composed only of water and oxygen.It kills microorganisms by creating an environment of intensive oxidation which causes the breakdown of organic substances. There are organism that naturally produce H2O2 as a byproduct of oxidative metabolism tho they also produce an enzymes known as catalyses peroxidases that decomposes low concentrations of H2O2 into oxygen and water.