Water-soluble trisazo dyes

Water-soluble trisazo dyes of the formula I ##STR57## wherein R.sup.1 is hydrogen, alkyl of 1-2 carbon atoms, alkoxy of 1-2 carbon atoms, hydroxyl, halogen or carboxyl,

• n is 1 or 2,
• A and B are each hydroxyl or amino but are not identical to each other,
• Z is the radical of an aromatic diamine of the formula II ##STR58## and K is the radical of a coupling component of the formula III ##STR59## wherein R.sup.2 is hydroxyl or unsubstituted or HOOCCH.sub.2 -- or HOCH.sub.2 CH.sub.2 -substituted amino,
• R.sup.3 is hydrogen, hydroxyl or unsubstituted or HOOCCH.sub.2 --, HOCH.sub.2 CH.sub.2 --, H.sub.2 NCO-- or phenyl-substituted amino,
• R.sup.4 is hydrogen, alkyl or 1-2 carbon atoms, unsubstituted or methoxy- or ethoxy-substituted alkoxy of 1-2 carbon atoms or SO.sub.3 H, and
• M.sup..sym. is a cation or a mixture of different cations selected from the group consisting of lithium, sodium and potassium, or an unsubstituted or HOCH.sub.2 CH.sub.2 -monosubstituted or -polysubstituted ammonium cation.