H2O2 - Hydrogen Peroxide

What is Hydrogen Peroxide?

Hydrogen peroxide is simplest peroxide. J.L Thenard who was a French chemist discovered Hydrogen peroxide in the year 1818. It is colorless chemical compound composed of hydrogen and oxygen. Its molecular formula is H2O2. It is acidic in nature and PH is about 4.5. It is 100 percent degradable compound. Ways of preparing hydrogen peroxide in laboratory: by the action of cold dilute H2SO4  on sodium or barium peroxide.

Properties of H2O2 (Hydrogen peroxide)

Hydrogen peroxide Chemical formula


Molecular Weight/ Molar Mass

4.0147 g/mol


1.05 g/cm3

Boiling Point

150.2 °C

Melting Point

-0.43 °C

Hydrogen Peroxide Structure (H2O2)


Hydrogen peroxide uses

  • It is used as bleaching agent in industries and for domestic purpose for hair
  • It is used as an antiseptic to clean teeth, wash wounds
  • It is used in the preservation of wine and milk
  • Our white blood cells produce hydrogen peroxide to kill bacteria
  • It is used to clean stains from sensitive fabrics and clothes
  • Soaking feet in water mixed with hydrogen peroxide for 15 min everyday for a week will help to get rid of fungus
  • Plant growth can be sustained by sprinkling mixture of hydrogen peroxide and water in equal amounts

Learn more about the chemical behavior and importance of hydrogen peroxide with the expert faculties at BYJU’S.

Practise This Question

Match the items in column I with their respective values in column II. 
1. According to Bohr's thoery
En = Total energy
Kn = Kinetic energy
Vn = Potential energy
rn = Radius of nth orbit energy

Column IColumn IIa.VnKn=?p.0b.If radius ofnthorbitExn,x=?q.1c.Angular momentum in lowest orbitalr.2d.1rnZy,y=?s.1