Synonyms: lithium;2,7-Naphthalenedisulfonicacid,5-amino-4-hydroxy-3-[[4'-[(1-hydroxy-4-sulfo-2-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-,monolithium disodium salt (9CI);2,7-Naphthalenedisulfonicacid,5-amino-4-hydroxy-3-[2-[4'-[2-(1-hydroxy-4-sulfo-2-naphthalenyl)diazenyl]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]diazenyl]-,lithium sodium salt (1:1:2);(3Z)-5-amino-3-[[2-methoxy-4-[3-methoxy-4-[(2Z)-2-(1- oxo-4-sulfonatonaphthalen-2-ylidene)hydrazinyl]phenyl]phenyl] hydrazinylidene]-4-oxonaphthalene-2,7-disulfonate;disodium;