Tetrakisazo dyes, their production and use

   
   

Tetrakisazo dyes of formula (I), as defined in claim 1, optionally in admixture with trisazo dyes of formula (X) as defined in claim 4, are valuable anionic dyes for the dyeing of substrates dyeable with anionic dyes, in particular for the dyeing of leather in very intense dark shades.

Le tinture di Tetrakisazo di formula (i), come definito nella rivendicazione 1, facoltativamente in mistura con le tinture di trisazo di formula (x) come definito nella rivendicazione 4, sono tinture anioniche importanti per tingersi dei substrati dyeable con le tinture anioniche, in particolare per tingersi del cuoio in tonalità scure molto intense.

 
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