Stable bleaching detergent composition

A stable bleaching detergent composition, consisting essentially of:

• A. from about one to about 30 percent by weight of a surfactant selected from the group consisting of water-soluble anionic surfactant, water-soluble nonionic surfactant, water-soluble amphoteric surfactant and mixtures thereof;
• B. from about one to about 50 percent by weight of an inorganic peroxygen compound capable of releasing oxygen in aqueous solution;
• C. the balance is a substance selected from the group consisting of water-soluble neutral inorganic builder salts, water-soluble alkaline inorganic builder salts, water-soluble organic builders and mixtures thereof;
• and
• D. from 0.001 to 5 parts by weight, per 100 parts by weight of the sum of the weights of A plus B plus C, of a compound or mixture of compounds having the formula ##STR35## wherein R.sub.1 is hydrogen or alkyl having one to 3 carbon atoms;
• ##STR36## is a monovalent radical of an unsaturated 5 member or 6 member heterocyclic ring containing only nitrogen and carbon atoms in the ring, or said heterocylic ring fused to a benzene ring or another heterocyclic ring to give a polycyclic radical having the characteristic ##STR37## grouping;
• R.sub.2 is hydrogen, unsubstituted alkyl having one to 10 carbon atoms, alkyl having one to 10 carbon atoms substituted with hydroxy, chloro, amino, alkoxy (C.sub.1 to C.sub.10), phenoxy, phenyl, hydroxyphenyl or benzoylamino, unsubstituted phenyl, phenyl substituted with one or two alkyls (C.sub.1 to C.sub.2), chloro, hydroxy, alkoxy (C.sub.1 to C.sub.10), acyloxy (C.sub.1 to C.sub.4) or amino, aroyl having 6 to 8 carbon atoms, pyridyl or oxopyrrolidinyl;
• R.sub.3 is hydrogen, unsubstituted alkyl having one to 22 carbon atoms, alkyl having one to 22 carbon atom substituted with hydroxy, chloro, alkoxy (C.sub.1 to C.sub.4), phenoxy, phenyl or amino, phenyl, phenyl substituted with one or 2 alkyls having one or 2 carbon atoms or alkoxy (C.sub.1 to C.sub.10), aroyl having 6 to 8 carbon atoms, alkoxy having one to 10 carbon atoms, phenoxy, halogen, alkylamino (C.sub.1 to C.sub.10), aminosulfonamido, alkanoyloxy (C.sub.2 to C.sub.6), aroyloxy (C.sub.6 to C.sub.8), carbamoyl, alkoxy (C.sub.1 to C.sub.10) carbonyl and aryl (C.sub.6 to C.sub.8) oxycarbonyl, or R.sub.3 and R.sub.4 together form a benzo group;
• and R.sub.4 is hydrogen or --R.sub.5 Y, in which R.sub.5 is alkylene having one to 6 carbons, alkylidene having one to 6 carbons or phenylene, and Y is a radical obtained by removing R.sub.4 from a compound of said formula.