does hydrogen peroxide expire?

How to Tell if Your Hydrogen Peroxide is Still Effective

Hydrogen peroxide: An unopened bottle can last up to three years, but as soon as it’s opened, its only good for six months. To test it out, pour some hydrogen peroxide into your sink and see if it fizzes. If it does, it’s still OK. The expired product isn’t harmful, but it won’t be effective.

Prepper Discusses: Expired Hydrogen Peroxide | Isopropyl Alcohol

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