Bisazo dyes and their preparation and use

A bisazo dye of formula (IX) ##STR47## and of formula (X) ##STR48## wherein A represents optionally substituted phenyl or optionally substituted naphthyl of general formula (XI), ##STR49## wherein R.sub.1, R.sub.2 and R.sub.3 independently represent hydrogen, SO.sub.3 M, COOM;

• carboxamido, N-substituted carboxamido, optionally substituted alkyl with 1 to 18 C atoms, optionally substituted alkoxy with 1 to 18 C atoms, halo, hydroxy, cyano or optionally substituted thioalkyl with 1 to 18 C atoms;
• provided that A represents substituted phenyl;
• or independently represent hydrogen, SO.sub.3 M or COOM;
• provided that A represents substituted naphthyl;
• R.sub.4 represents hydrogen or SO.sub.3 M;
• n is 2, 3 or 4;
• and
• M represents hydrogen, a metal cation or an ammonium cation, optionally substituted by one or more alkyl or substituted alkyl groups each having 1 to 18 C atoms.