This alkaline chemical has the formula H2O2 and the structure H-O-O-H, which is able to break apart into free radicals. It is a clear, dense liquid at room temperature which freezes at -41°C and boils at 150.2°C. It can be dissolved in water and alcohols. It is also toxic when concentrated and can be a fire and explosion hazard. Hydrogen peroxide is used in bleaches, dyes, cleansers, antiseptics, and disinfectants. It is generated by the body as a potentially harmful byproduct of aerobic cellular respiration which, if left alone, will cause extensive damage to DNA.