elements; is the most common element in the earth's crust, and is essential to life processes. Hydrogen Peroxide (H2O2): a colorless, syrupy liquid and in its pure form and at a low pH..., it is a relatively stable compound. Hydrogen peroxide is manufactured from hydrogen gas and atmospheric oxygen. In aqueous form, it is commonly used as a bleaching agent. Hydrogen... peroxide will bleach hair, but not skin. Water (H2O): chemically a compound of hydrogen and oxygen. It contains one less oxygen molecule than hydrogen peroxide. Catalase: a red...