Hydrogen peroxide has molecular formula of H2O2. It exits as a clear viscous liquid and has a slightly pungent smell. It is soluble in water and able to react explosively in aqueous state. Commercial Grades concentration is about 50-98%, but when the concentration of H2O2 increases more then 68% it has the potential to convert itself to oxygen and steam, hence for export H2O2 concentration is maintained between 50-60% . For Pharmaceutical Industry 3 and 6 wt% concentration is preferred and laboratory use,30 wt% solutions are most common.
A solution of 2-ethylanthraquinone is first hydrogenated using nickel or palladium as catalyst. Air is then passed through the solution and water is also added to produce hydrogen peroxide. Stabililisers can also be added to make hydrogen peroxide less explosive.