Hindered phenolic antioxidant

The hindered phenolic name is derived from a unique structure of this type of AO. hydroxyl moiety on the phenol is flanked by two bulky groups (R, & R). This special structure allows hindered phenolic antioxidants to release hydrogen to quench peroxy radicals at high temperatures without jeopardizing the phenol from being oxidized to a quinone, which is a chromophore. hindered phenolic antioxidant oxy radical produced after hydrogen release is stabilized by various resonance forms and can quench another peroxy radical. making it a two-radical scavenger.

Common hindered phenolic antioxidants include Linanox 1010, 1024, 1035, 1076, 1098, 1135, 1520, 1726, 1790, 245, 3114, 330, 702.

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