Hydrogen peroxide (H2O2) is neither an acid nor a base. It is a weak acid in its pure form, but it is generally considered a neutral compound. This is because it does not significantly donate protons (H+) in aqueous solutions, which is a characteristic of acids, nor does it accept protons, which is a characteristic of bases.
Hydrogen peroxide can act as both an oxidizing agent and a reducing agent, depending on the reaction conditions. Its chemical properties are more complex than those of simple acids or bases. In some reactions, it can exhibit acidic behavior, but this is not its primary characteristic.
In summary, hydrogen peroxide is not classified strictly as an acid or a base. It is a unique compound with properties that allow it to participate in a variety of chemical reactions.