Deoxidizer composition

Abstract

A deoxidizer composition is provided, which exhibits high oxygen absorption performance while suppressing initial oxygen absorption and maintaining sufficient oxygen absorption performance after a certain period of operation in the atmosphere. The deoxidizer composition comprises iron powder coated with metal halide containing iron oxides on its surface (A), and a moisture supply agent (B). The iron content in the iron powder after removing the metal halide and moisture from the metal halide-coated iron powder (A) is greater than 96.3% by mass and less than 99.0% by mass. The metal halide content is 0.01 to 0.10 parts by mass per 100 parts by mass of the iron powder after removing the metal halide and moisture from the metal halide-coated iron powder (A).