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azo dye any dye containing one or more azo groups
Ãâó: wordnet.princeton.edu/perl/webwn
azo dye An azo dye is one of an extensive range of synthetic organic dye made from aniline, by first converting it with sodium nitrite to a diazonium chloride salt which is then reacted with other aromatic amines, phenols and sulphonic acids. The well known indicator methyl-orange is formed by making the diazo salt of sulphanilic acid, and reacting the product with dimethylaniline (see below):
Ãâó: www.ch.ic.ac.uk/vchemlib/mol/glossary/
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