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azo dye

DEFINITIONS OF: azo dye

1

n any dye containing one or more azo groups

Types:
congo red
a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)
methyl orange
an azo dye used as an acid-base indicator; used for titrations involving weak bases
Type of:
dye, dyestuff
a usually soluble substance for staining or coloring e.g. fabrics or hair
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