WESTCO™ AO 1010 Tetrakis [methylene-3(3’, 5’-di-tert-butyl-4’-hydroxyphenyl) propionate] methane CAS# 6683-19-8

WESTCO™ AO 1010 is a versatile antioxidant giving excellent processing stability and long term heat aging characteristics. It is used in a variety of polymers where elevated processing temperatures are encountered. Effective in mineral filled compounds based on fully saturated polymers used in rubber production. Also excellent for use in high density polyethylene and polypropylene production.

Several packaging options are available. Contact WRCC for more details


Appearance: White powder/free flowing granule/flake
Total Assay (HPLC)

94% Min.

*Effective Assay

98% Min.

*Melting Point, °C

110°C Min.


0.1% Max.


0.5% Max.

*Light Transmitability, 425 nm

96% min

*Light Transmitability, 500 nm

97% min

Specific Gravity


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

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      • Western Reserve Chemicals
      • 60 S. Seiberling Street
      • Akron, OH 44305

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