FIELD: production of aniline dyes. SUBSTANCE: method involves diazotization of 4-nitroanilin-2-sulfo acid followed by interaction with phenyl-gamma- acid. The latter process is carried out at pH 0.6-0.8 or pH 2-3. At pH 0.6-0.8 blue dye is prepared, at pH 2-3 brown dye being prepared. EFFECT: improves efficiency of method. 1 tbl
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