Triazo dyestuff and process for preparing same

Details Triazo dyestuff and process for preparing same Triazo dyestuff and process for preparing same

C - Chemistry, Metallurgy

09

B

260/159

C09B 31/16 (2006.01) C09B 33/18 (2006.01) C09B 35/38 (2006.01) C09B 35/46 (2006.01)

Patent

CA 1039714

TRIAZO DYESTUFF AND PROCESS FOR PREPARING SAME ABSTRACT OF THE DISCLOSURE The triazo dyestuff having the formula: Image (I) is useful in dyeing polyamide fibers and leather. This compound is prepared by tetraazotizing 4,4'-diamino-benzanilide, after which the obtained tetrazo-compound is coupled in an acid medium with 1-amino-8-naphthol-3,6-disulphonic acid to form a diazo- monoazo-compound which is then coupled, in an alkaline medium, with the sulphanilic acid diazoderivative and, finally, the diazo- compound is coupled in an alkaline medium with meta-hydroxy- phenylglycine.

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