Ear drops can contain various forms of hydrogen peroxide. A common type is carbamide hydroxide, which adds oxygen to the wax, causing it to bubble. This softens and helps to remove the buildup.

Hydrogen peroxide (H 2 O 2) is widely used as a bleach, disinfectant, and oxidising agent, among other things. However, industrial production of H 2 O 2 is expensive and uses a lot of energy owing ...