Substituted 4-(2-benzothiazolyl)phenylazo dyes having a quaternary ammonium, hydrazinium or optionally substituted amino substituent

摘要: Azo dyes of the formula ##SPC1## Where X stands for radical a coupling component aminobenzene, hydroxybenzene, aminonaphthalene, hydroxynaphthalene or heterocyclic series one with methylene group, A n - an anion equivalent to K + , 1 6, group ##EQU1## and where aromatic rings B and/or D may be further substituted. The are useful dyeing printing paper (e.g., in stock). dyed is fast light wet treatments has good fastness bleaching, water, alcohol light.