A substance added to rubber or other materials to protect them from damage caused by ozone.
From anti- (against) + ozone (from German Ozon, from Greek ozein 'to smell') + -ant (agent noun suffix). Developed in the rubber industry in the 20th century as ozone damage became a recognized problem.
Antiozonants are invisible heroes in your car tires—ozone in the air cracks rubber, so manufacturers add antiozonants to keep your tires from becoming brittle, a battle that's happening on your car right now.
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