PROBLEM TO BE SOLVED: To provide a novel antioxidant comprising an inorganic powder containing electrons.SOLUTION: The antioxidant has as an effective component a 12CaO-7Al2O3 compound containing electrons (e-) of &ge2×1018 cm-3 and <2.3×1021 cm-3.COPYRIGHT: (C)2009,JPO&INPIT【課題】新規な抗酸化剤を提供する。【解決手段】2×1018cm-3以上、2.3×1021cm-3未満の電子(e-)を含む12CaO・7Al2O3化合物を有効成分とする抗酸化剤。【選択図】図5