Normally, hydrogen peroxide decays slowly, resulting in the product being water and oxygen. Light and heat will accelerate the decay faster. Hydrogen peroxide reacts with decay.
In general, hydrogen peroxide is in a 3-90% concentration solution. It is often used as a bleach in food. Cleaning agent Sterilizing solution Used to kill germs on the skin. Used to wash old oil paintings to brighten up, make mouthwash. And 90% concentrated hydrogen peroxide can be used as rocket propellant