Tire Industry 6PPD Replacement Effort
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At a glance
The tire industry is seeking a replacement for N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD), an antiozonant used in tires for half a century. On October 16, 2026, a consortium of U.S. tire manufacturers reported it had eliminated 38 potential antiozonants, leaving 39 molecules still under evaluation in a review scheduled to conclude in 2029. The outcome matters because tiremakers need a proven, scalable substitute for a longstanding material central to tire production. The next milestone to watch is completion of the consortium's review in 2029.
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Tiremakers Narrow Search for 6PPD Replacement
On October 16, 2026, a consortium of U.S. tire manufacturers reported narrowing its search for a replacement for 6PPD, the antiozonant used in tires for half a century. The group eliminated 38 potential antiozonants from consideration, leaving 39 molecules still under evaluation. With no prior cuts reported, the move marks the first major winnowing of candidates.
It matters because the industry needs a proven, scalable alternative to a longtime standard. The consortium's review is scheduled to conclude in 2029.
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