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AO-549 (GS)

CAS: 123968-25-2

Bifunctional-processing stabilizer


AO-549 functions as alkyl radical scavenger during processing/compounding. It provides excellent heat resistance at elevated temperatures during polymer processing, as well as resistance to discoloration, while minimizing Fish-Eye gels and die build-up.

Chemical name:

2-(1-(2-hydroxy-3,5-di-tert-pentyl-phenyl)ethyl)-4,6-di-tert-pentylphenyl acrylate


2-{1-[2-hydroxy-3,5-bis(2-methylbutan-2-yl)phenyl]ethyl}-4,6-bis(2-methylbutan-2-yl)phenyl prop-2-enoate

Molecular formula:


Molecular weight:

549 g/mol

CAS number:


EC number:


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