Synonyms: Disodium (4-((5-chloro-2-hydroxyphenyl)azo)naphth(2,1-d)-1,3-oxathiol-5-ol 3,3-dioxidato(2-))(3-hydroxy-4-((2-hydroxy-1-naphthyl)azo)naphthalene-1-sulphonato(3-))chromate(2-);Chromate(2-), (4-((5-chloro-2-hydroxyphenyl)azo)naphth(2,1-d)-1,3-oxathiol-5-ol 3,3-dioxidato(2-))(3-hydroxy-4-((2-hydroxy-1-naphthalenyl)azo)-1-naphthalenesulfonato(3-))-, disodium