sodium 1-amino-4-[[3-[(chloroacetyl)amino]phenyl]amino]-9,10-dihydro-9,10-dioxoanthracene-2-sulphonate

1-Amino-4-[[3-[(chloroacetyl)amino]phenyl]amino]-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid sodium salt