128-91-6

1,5-Dihydroxy-4, 8-dinitroanthraquinone is an important dye precursor for CI Disperse Blue 56, hydrolysis with aqueous alkali. 1,5-Dinitro-4,8-dihydroxyanthraquinone is also prepared from dimethoxyanthraquinone. High purity of 1,5-dimethoxyanthraquinone is required for manufacturing disperse blue dyes.

1,5-Dihydroxy-4,8-dinitroanthraquinone is prepared from 1,5-diphenoxyanthraquinone by nitration followed by alkaline hydrolysis .