Hydrogen peroxide is a chemical compound with the formula H ₂O ₂. In its pure form, it is a very pale blue, liquid, slightly more viscous than water. Hydrogen peroxide is the simplest peroxide. It is used as an oxidizer, bleaching agent, and antiseptic.. It is used as an oxidizer, bleaching agent, and antiseptic.Hydrogen peroxide (formula H2O2) is a chemical compound that’s a combination of hydrogen and water. The clear liquid acts as a mild antiseptic and comes in various potencies depending on its purpose: 3 percent (household use), 6 to 10 percent (hair bleaching), 35 percent (food-grade) and 90 percent (industrial). 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 (e.g., due to canker/cold sores, gingivitis). In its pure form, it is a very pale blue, liquid, slightly more viscous than water. Hydrogen peroxide is the simplest peroxide. It is used as an oxidizer, bleaching agent, and antiseptic. It is available in make such as GACL, National Peroxide (NPL), and Imported.