Abstract: To quench the fluorescence produced by anionic fluorescent brighteners use is made of virtually colorless, water-soluble cationic or amphoteric compounds which contain in the molecule at least one ammonium group, at least two aryl, arylene, hetaryl and/or hetarylene groups and at least one nitro group.

Abstract: Basic triphendioxazine dyestuffs of the formula ##STR1## wherein Q denotes the radical ##STR2## or hydrogen, R.sub.1 and R.sub.2, independently of each other, denote hydrogen, halogen, alkyl, aryl, alkoxy, aryloxy, CN, CONH.sub.2, CONH--alkyl, CON(alkyl).sub.2, CONH--aryl, COO--alkyl, NH--CO--alkyl or NH--CO--aryl andR.sub.3 and R.sub.4, independently of each other, each denote hydrogen or alkyl, orR.sub.3 and R.sub.4 are joined together into a ring,A denotes a divalent hydrocarbon radical which is optionally interrupted by oxygen or sulphur,R.sub.5 denotes a radical of a polyamine which can be protonated or quaternized,R.sub.6 is defined the same way as R.sub.5 or denotes NH.sub.2, NH--alkyl, N(alkyl).sub.

Abstract: Distyryl compounds of the formula ##STR1## wherein A denotes 1,4-phenylene, 4,4'-biphenylylene, 4,4"-terphenylylene, 1,4-, 1,5- or 2,6-naphthylene, 9,10-dihydro-2,7-phenanthrenylene or 2,7-dibenzofuranylene,R.sup.1 denotes an optionally functionally modified phosphonic acid, phosphonyl or phosphinyl group,R.sup.2 denotes hydrogen, an optionally functionally modified phosphonic acid, phosphonyl or phosphinyl group, sulpho, carboxyl, alkoxycarbonyl, aryloxycarbonyl, aralkoxycarbonyl, aminocarbonyl, cyano, halogen, alkyl, aralkyl, alkenyl, hydroxyl, alkoxy, aralkoxy, cycloalkoxy, aryloxy or alkylmercapto andR.sup.3 and R.sup.

Abstract: Disazo dyestuff which in the form of the free acid correspond to the formula ##STR1## in which W stands for the radical ##STR2## or the radical ##STR3## R.sub.1 stands for hydrogen, an alkyl radical or a phenyl group; R.sub.2 and R.sub.3, independently of one another, stand for hydrogen, halogen, an alkyl group, an alkoxy group or an acylamino group; R.sub.4 stands for hydrogen, halogen, an alkyl group, an alkoxy group or an acylamino group; R.sub.5 stands for hydrogen, an alkyl group or an alkoxy group; R.sub.6 and R.sub.7, independently of one another, stand for hydrogen, hydroxy, cyano, halogen, acyloxy, alkoxycarbonyl or phenyl; X stands for an alkylene radical with 1 - 4 carbon atoms; R.sub.8 stands for an alkyl, phenyl, 2-naphthyl or 4-biphenyl group which is not further substituted; R.sub.9 stands for hydrogen or an alkyl group with 1 - 6 carbon atoms which may be substituted by a nitrile, carboxamide or carboxyl group; R.sub.10 stands for a substituent; and n stands for the numbers 0 - 2.

Abstract: Disazo dyestuffs which in the form of the free acid correspond to the general formula ##STR1## wherein R denotes an alkyl radical with 1-4 carbon atoms, X represents hydrogen or a methyl group and Y represents hydrogen or an alkyl radical with 1-4 carbon atoms, and the ring A can be substituted by chlorine or alkyl groups with 1-4 C atoms.The dyestuffs are especially suitable for dyeing polyamide fibers from neutral to weakly acid dyebaths. The dyeings are of good light fastness.