Hydrogen peroxide is a hazardous substance or chemical. According to the Dangerous Substance Directive of European Union (EU) laws, hydrogen peroxide is classified as oxidant (O), corrosive (C) and harmful (Xn).
The easiest way to recognize this is through hazard symbol. Then, the question is, what is hydrogen peroxide hazard symbol than describe its hazards? Here is the hydrogen peroxide hazard symbol based on European Union standard:
You should easily see those hazard symbols on hydrogen peroxide packaging, including polyethylene can, drum, 1MT container or bulk container.
Alternatively, you can find out its hazard symbol from hydrogen peroxide MSDS. If you have not had such document, you could download it here.