Abstract
Azo dyes are characterised by presence in the molecule of one or more azo groups —N = N—, which form bridges between organic residues, of which at least one is usually an aromatic nucleus. Many methods are available for preparing azo compounds, but manufacture of azo dyes is always based on the coupling of diazonium compounds with phenols, naphthols, arylamines, pyrazolones or other suitable components to give hydroxyazo or aminoazo compounds or their tautomeric equivalents. In the resulting dyes the azo group is the chromophore and the hydroxyl or amino group is an auxochrome.
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© 1971 R. L. M. Allen
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Allen, R.L.M. (1971). The chemistry of azo dyes. In: Colour Chemistry. Studies in Modern Chemistry. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-6663-2_3
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DOI: https://doi.org/10.1007/978-1-4615-6663-2_3
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