Antioxidants are chemical substances used to prevent oxidation reactions in materials, which can lead to aging and corrosion, among other adverse effects. Also known as preservatives or preservative agents, antioxidants are widely used in industrial fields such as rubber, plastics, and inks. Their role is to enhance the durability, stability, and reliability of materials.

Antioxidants primarily function to prevent oxidation of materials caused by oxygen or free radicals. Within materials, a series of oxidation reactions often occur between free radicals and other substances, leading to material aging and failure. Antioxidants slow down the rate of oxidation by capturing free radicals or preventing their formation, thereby extending the material's lifespan.