New Dyes of the formula ##STR1## are described wherein R represents alkyl, alkenyl or preferably hydrogen,X represents a modified carboxyl group, the radical --SO.sub.2 --T or a heterocyclic radical wherein T represents alkyl, alkenyl or preferably aryl,An represents an anion,Y represents a basic radical bound by way of a modified carboxyl group,Z represents a nonionic substituent,n represents 0, 1 or 2,m represents 0 or 1,A represents a heterocyclic radical or --CN,andB and C can carry further nonionic substituents, which dyes yield briliant, bright orange to red dyeings which for the most part fluoresce in ultraviolet light and have excellent fastness properties in service.