Solid oxidation compositions for use with bleaching and washing agents consisting essentially of from 5% to 90% by weight of at least one hexacyclic ester-anhydride having the formula ##STR7## wherein R is a member selected from the group consisting of hydrogen, alkyl having 1 to 18 carbon atoms and --(CH2)n -- (CHOH)m -- COOY, where n is an integer from 1 to 3, m is an integer from 0 to 1 and Y i