Abstract: A tempering composition for tempering grain in a tempering step and controlling pathogens susceptible to be present in and/or on said grain during the tempering step of the grain, said tempering step being eventually carried out before subjecting the tempered grain to a milling step; wherein said tempering composition comprises tempering-water and an oxidizing composition comprising at least one oxidizing agent and/or a precursor thereof, and eventually at least one an agriculturally acceptable excipient and/or at least one additive; and wherein the at least one oxidizing agent represents from 0.01 to 50% by weight of the oxidizing composition. A use and a method for tempering grain and controlling pathogens susceptible to be present on grain. An oxidizing composition for preparing the tempering composition. A use of the tempering composition for sanitizing mill systems. A method for sanitizing mill systems.