3-Aminobenzenesulfonic acid → Anthraquinone

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Example 3 was repeated, except that the compounds shown in 1st, 2nd and 3rd columns of the following table were used in place of the 1-amino-2-(3'-amino-4'-sulfophenoxy)-4-(4'-sulfophenylthio)anthraquinone, 1-aminobenzene-4-β-sulfatoethylsulfone and 3-aminobenzenesulfonic acid respectively, thereby obtaining a corresponding anthraquinone. The color shade obtained by dyeing cotton with the anthraquinone compound is as shown in a 4th column of the table. Each compound can exhibit superior dye performances as described hereinabove.

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