Hydrogen Peroxide is a chemical compound with the formula H 2O 2. In its pure form, it is a very pale blue liquid that is slightly more viscous than water.
Hydrogen peroxide is a mild antiseptic used on the skin to prevent infection of minor cuts, scrapes, and burns. It may also be used as a mouth rinse to help remove mucus or to relieve minor mouth irritation (such as due to canker/cold sores, gingivitis).