To provide a method for using a cyclic sugar ketone as a catalyst for a peroxo compound.

A method for using a cyclic sugar ketone of formula (1) (wherein, R1 and R2 are each H, a 1-22C alkyl, a 2-22C alkenyl or phenyl; R3 is a 1-4C alkoxyl, phenyl, CH2O or a group of formula (2); R4 is H, or joined together with R3 to form a group of formula (3); and (n) is 0 or 1) as a catalyst for a peroxo compound is provided.