Oxidant (noun)

A substance that causes or accelerates oxidation, especially one that removes electrons from another molecule.

Origin:

Late 19th century, from oxidize + -ant.

Examples:

1. Oxygen is a powerful oxidant that can cause rust.
2. Hydrogen peroxide is a common oxidant used in bleach.
3. Ozone is a strong oxidant that is used to purify air and water.
4. Polluted air contains many oxidants that can harm human health.
5. The oxidant in the bleach can cause skin irritation.