disodium 1-amino-4-[3-[[(3,6-dichloropyridazin-4-yl)carbonyl]amino]-2,4,6-trimethyl-5-sulphonatoanilino]-9,10-dihydro-9,10-dioxoanthracene-2-sulphonate

1-Amino-4-[[3-[[(3,6-dichloropyridazin-4-yl)carbonyl]amino]-2,4,6-trimethyl-5-(sodiosulfo)phenyl]amino]-9,10-dihydro-9,10-dioxoanthracene-2-sulfonic acid sodium salt