Reactive complex chromium-bearing azo dyestuffs

Claim 1

A complex chromium bearing dyestuff of the formula: ##STR177## wherein A represents a phenylene or naphthylene nucleus; B represents a coupling component selected from the group consisting of acetoacetarylide, aniline, phenol, 5-pyrazolone, naphthylamine and naphthol, A and B being unsubstituted or substituted by one or more of sulfo, halogen, nitro, alkyl having 1-4 carbon atoms, alkoxy having 1-4 carbon atoms, acetylamino, unsubstituted phenylamino, phenylamino substituted by sulfo, unsubstituted phenylazo or naphthylazo, phenylazo or naphthylazo substituted by one or more of nitro, halogen, carboxy, sulfo or alkoxy having 1-4 carbon atoms, unsubstituted phenyl or phenyl substituted by one or more of sulfo or halogen, at least one --SO 3 H group being present per atom of chromium; Y 1 represents the residue --O-- or ##STR178## Y 2 represents the residue --O-- or --NH--; Y 1 and Y 2 are respectively in the ortho position with respect to the --N═N-- group; E represents the residue of a monoanionic bifunctional chelating agent; G represents a neutral monofunctional ligand; and Z represents a reactive group attached to A or to B directly or via a bridging group ##STR179## --SO 2 NH-- or --CONH-- wherein R is hydrogen or alkyl having 1 to 2 carbon atoms.