azo dye

English Thesaurus

1. any dye containing one or more azo groups (noun.substance)

hypernym	:	dye, dyestuff,
definition	:	a usually soluble substance for staining or coloring e.g. fabrics or hair (noun.substance)

hyponym	:	congo red,
definition	:	a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions) (noun.substance)

hyponym	:	methyl orange,
definition	:	an azo dye used as an acid-base indicator; used for titrations involving weak bases (noun.substance)