Nondiffusible 6-arylazo-3-pyridinol

A nondiffusible compound having a releasable 6-arylazo-3-pyridinol magenta dye moiety or precursor thereof, said compound having the formula:

• ##STR33## wherein:
• (a) R represents hydroxy or amino;
• (b) R.sup.1 represents hydrogen, a hydrolyzable moiety or CAR;
• (c) G represents carboxy;
• a hydrolyzable ester group having the formula COOR.sup.2, wherein R.sup.2 is alkyl or substituted alkyl having 1 to about 8 carbon atoms or aryl or substituted aryl having 6 to about 10 carbon atoms;
• or sulfamoyl having the formula SO.sub.2 NHR.sup.3 wherein R.sup.3 represents hydrogen, alkyl or substituted alkyl having 1 to about 8 carbon atoms, aryl or substituted aryl having 6 to about 10 carbon atoms, or carbacyl having 1 to about 8 carbon atoms;
• (d) CAR represents a ballasted carrier moiety capable of releasing said diffusible 6-arylazo-3-pyridinol magenta dye moiety or precursor thereof under alkaline conditions;
• and
• (e) n is 0, 1 or 2, with the proviso that when n is 0, then R.sup.1 is CAR;
• and wherein the phenyl ring illustrated above is not substituted with a nitro group.