Hydrogen peroxide solutions can freeze, but the freezing point depends on the solution. That does not make a household freezer an appropriate storage recommendation.
Do not concentrate hydrogen peroxide at home
Do not use freezing, heating or evaporation to increase a product’s concentration. This article does not provide a home-concentration method. Follow the supplier’s instructions for the product you have rather than trying to alter it.
Follow the product’s storage instructions
Use the storage conditions specified on the product label and safety data sheet. Do not assume that a refrigerator or freezer is suitable. If the instructions are unclear, ask the supplier before changing the storage conditions.
Keep the product in its original labeled container, away from children. Do not replace its closure with an improvised airtight seal or transfer it into a food or drink container. Avoid contamination and keep it away from heat and incompatible chemicals as directed by the supplier.
Handling precautions
Hydrogen peroxide can harm the eyes and skin, and it must not be swallowed. Follow the product-specific instructions for protective equipment, ventilation and first aid. If an exposure occurs, seek appropriate medical or poison-control advice promptly.
The takeaway
The useful question is not simply whether hydrogen peroxide freezes, but how your specific product must be stored. Follow its label and safety data sheet; do not use this article as a freezer-storage or concentration guide.
