1-Amino-4-((4-butylphenyl)amino)-9,10-dihydro-9,10-dioxoanthracene-2-sulphonic acid 2-Anthracenesulfonic acid, 1-amino-4-((4-butylphenyl)amino)-9,10-dihydro-9,10-dioxo- 58965-11-0 EINECS 261-524-5