If you have hydrogen peroxide you no longer need, keep it in its original labeled bottle while you arrange disposal.
Ask your local household hazardous waste program whether it takes that product.
Never mix hydrogen peroxide with baking soda, vinegar, bleach, drain cleaner, metals, or any other chemical.
Don’t pour it into a sink, toilet, storm drain, soil, or trash unless both the label and your local program allow that method.
Check the Concentration and Product Type
Ordinary first-aid hydrogen peroxide is often labeled 3 percent.
Hair developer, pool products, industrial peroxide, food-grade peroxide, and laboratory solutions may be much stronger or contain other ingredients.
Read the entire label before you handle or dispose of it.
If you don’t know the concentration or contents, treat the bottle as household hazardous waste and tell the facility you’re unsure what’s inside.
Hydrogen peroxide isn’t flammable, but it is a powerful oxidizer.
That means it can make certain materials burn more intensely, according to CDC’s Agency for Toxic Substances and Disease Registry.
Your risk of burns and other serious injuries increases with the concentration.
Route for an Intact Household Bottle
- Read the storage and disposal directions on the label.
- Keep the peroxide in its original bottle with the label attached.
- Search your city or county household hazardous waste directory for hydrogen peroxide or oxidizers.
- Call before you go and give the concentration, amount, product type, and condition of the bottle.
- Follow the facility’s instructions for transporting it.
Santa Clara County, California, specifically accepts hydrogen peroxide with oxidizers through its household hazardous waste program.
Mecklenburg County, North Carolina, also lists hydrogen peroxide.
It tells residents to use original labeled containers, never mix chemicals, keep them away from heat, and pack them securely.
Those are local examples, so they don’t guarantee that a facility near you will take the same product.
Three Percent First-Aid Peroxide
If an intact bottle is within its labeled shelf life and you have a real labeled use for it, using it as directed can prevent waste.
Don’t invent a cleaning, gardening, medical, or drain use simply to empty the bottle.
The label decides how you may use that product.
An old or weak bottle may have lost strength, but bubbling doesn’t reliably tell you its concentration or safety.
Don’t taste it, smell it closely, mix it, or test it on your skin.
If you no longer want it, use the local disposal option you confirmed.
Stronger or Unknown Peroxide
Don’t try to dilute or neutralize concentrated peroxide yourself.
Leave the cap and any vented closure as the manufacturer designed them.
Keep the bottle upright and away from combustible or incompatible materials.
Tell the household hazardous waste program the strength and amount before you bring it in.
Commercial, farm, salon, school, or laboratory peroxide may need a licensed waste service instead of a household program.
Leaking, Bulging, Corroded, or Unlabeled Containers
Move a damaged bottle only when necessary, and don’t put the peroxide into another chemical container.
Keep people and pets away from it.
If the bottle is corroding, EPA advises calling your local hazardous materials official or fire department for instructions.
Use the fire department’s non-emergency number unless there’s an active fire, dangerous reaction, serious exposure, or immediate threat.
Empty Bottles
A bottle is “empty” only when no free liquid remains, not simply when the pump stops working.
Follow the product label and your local program’s instructions for the container.
Don’t rinse concentrated or unknown peroxide down a drain just to make the bottle recyclable.
Your recycler may reject chemical containers even when the plastic has a resin number.
If Someone Is Exposed
For eye or skin contact, start rinsing with water and follow the first-aid directions on the label.
Get medical help promptly after swallowing, breathing trouble, burns, severe pain, or exposure to a concentrated product.
In the United States, call Poison Control at 1-800-222-1222, or call 911 for severe or life-threatening symptoms.