Carry on baggage
Yes
Checked baggage
Yes
3% hydrogen peroxide found in drugstores and used to clean cuts is considered essential non-prescription medication. These liquids must be declared to the Screening Officer separately.
Carry on: You can carry volumes greater than 100 ml (3.4 oz.) in your carry-on baggage.
Checked: You can carry volumes greater than 100 ml (3.4 oz.) in your checked baggage.