Synonyms: 2-[[1-Amino-7-[[4-[[6-amino-5-[(3-sodiooxycarbonyl-4-hydroxyphenyl)azo]-1-hydroxy-3-sodiooxysulfonyl-2-naphthalenyl]azo]-2-methoxyphenyl]azo]-8-hydroxy-3,6-bis(sodiooxysulfonyl)-2-naphthalenyl]azo]-5-[[6-amino-5-[(3-sodiooxycarbonyl-4-hydroxyphenyl)azo]-1-hydroxy-3-sodiooxysulfonyl-2-naphthalenyl]azo]benzoic acid sodium salt