The autodecomposition can be represented overall as follows: 2H2O2 → 2H2O + O2. Pure hydrogen
peroxide and its aqueous solutions are clear liquids resembling water. Unlike water, hydrogen
peroxide has a slightly sharp and distinctive odor. Low concentrations (1% to 3%) of hydrogen
peroxide are sold in drug stores as a mild antiseptic. Hydrogen peroxide is available
commercially at aqueous concentration as high as 80%.