Synonyms: 1,3-Benzenedisulfonic acid, 4,4'-(1,2-ethenediylbis((3-sulfo-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino))bis(6-((5-(aminocarbonyl)-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridinyl)azo)-;4-[(5-carbamoyl-1-ethyl-2-hydroxy-4-methyl-6-oxo-3-pyridyl)azo]-6-[[4-[[4-[2-[4-[[4-[[5-[(5-carbamoyl-1-ethyl-2-hydroxy-4-methyl-6-oxo-3-pyridyl)azo]-2,4-disulfo-phenyl]amino]-6-chloro-1,3,5-triazin-2-yl]amino]-2-sulfo-phenyl]vinyl]-3-sulfo-phenyl]amino]-6-chloro-1,3,5-triazin-2-yl]amino]benzene-1,3-disulfonic acid