- The Identification of Azo Dyes. Part 2. Reversal of Azo-Coupling and Reduction of Azo Groups.
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On treatment with pyridine, phenol and sulphuric acid, azo dyes decompose, giving variable yields of p-arylazophenols by transfer of the arylazo-group present in the dye to phenol.In some cases this leads to a practical method of identification on a small scale.Alternatively, reduction of azo dyes using titanous hydroxide is efficient and general, and the resultant amines can be identified as such or after dinitrophenylation.
- Clemson, Anthony,Symons, Christine,Rezakhani, Soraya,Whiting, Mark C.
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p. 2415 - 2425
(2007/10/02)
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