abstract |
A COLORED AZO COUPLER OF THE FORMULA 1-(R-NH-CO-),3-(PHENYL-NH-),4-((3-Y,4-HO,5-X-PHENYL)- N=N-)PYRAZOLIN-5-ONE WHEREIN Y IS HYDROGEN, HALOGEN OR CARBOXYL, X IS HALOGEN OR CARBOXYL, AND R IS AN ARYL RADIDCAL HAVING AT LEAST ONE WATER-SOLUBILIZING GROUP AND AT LEAST ONE GROUP IMPARTING NON-DIFFUSIVITLY TO THE COUPLER. |