1-Amino-9,10-dihydro-4-((4-methyl-2-sulfophenyl)amino)-9,10-dioxo-2-anthracenesulfonic acid, sodium salt 2-Anthracenesulfonic acid, 1-amino-9,10-dihydro-4-((4-methyl-2-sulfophenyl)amino)-9,10-dioxo-, sodium salt 72245-58-0