Parameters of inhibited oxidation of isotactic propylene containing antioxidant 2,2'-methylene-bis(4-methyl-6-tert-butylphenol) has been studied in the temperature range 140-210 degrees C. Unlike polyethylene, the dependencies of inhibited oxidation parameters: of critical antioxidant concentration and of rate constant of antioxidant consumption change with temperature do not obey Arrhenius law both below and above the melting temperature. (c) 2006 Wiley Periodicals, Inc.