Hydrogen peroxide (H₂O₂) is a clear, colorless liquid compound of oxygen and hydrogen. It was discovered in 1818 by Louis Jacques Thénard, as he reacted barium peroxide with nitric acid. Since then, hydrogen peroxide has been used as a powerful oxidizing agent. It’s used in the production of bleaching agents, for example, for paper, textiles or hair. It’s also used as a household disinfectant and cleaning agent. Hydrogen peroxide decomposes to water and oxygen.