disodium 3-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylate

3-[[4-[(7-Amino-1-hydroxy-3-sodiooxysulfonyl-2-naphtyl)azo]-1-naphtyl]azo]-2-hydroxybenzoic acid sodium salt

Benzoic acid, 3-[[4-[(7-amino-1-hydroxy- 3-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2 -hydroxy-, disodium salt