WESTCO™ AO-309 p- (p-toluenesulfonyl amido) diphenylamine CAS# 100-93-6

WESTCO™ AO-309 is an effective antioxidant for natural and synthetic rubber that provides good protection against copper and manganese. Causes slight discoloration in cured stock exposed to light; non-staining by migration.

Packaging: 25 kg bag


Appearance: Gray powder
*Melt point

135°C Min.

*Drying loss

0.5% Max.


0.3% Max.


1.32 Typical

*Actual tech data / technical data values reported on Certificate of Analysis

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  • Western Reserve Chemical
  • 4837 Darrow Road
  • Stow, OH 44224

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