... ursol rubber antioxidant, 6PPD has better compatibility with rubbers, seldom blooming, low volatility, low toxicity, with excellent antioxidant, anti-ozone, anti-flex ... to all types of synthetic rubber and natural rubber. With good dispensability in sizing material and little effect on vulcanization ... N.W. 20kg/bag, or N.W. 25Kg/bag, packed with kraft paper bag. Rubber Antioxidant 6PPD(4020)