2-Anthracenesulfonic acid, 9,10-dihydro-1,5-dihydroxy-4,8-bis(methylamino)-9,10-dioxo-, ammonium sodium salt 72918-30-0 Anthraquinone-2-sulfonic acid, 4,8-bis(methylamino)-1,5-dihydroxy-,sodium, ammonium salt