Synonyms: 3,3'-(Cyclohexylidenebis((2-methoxy-p-phenylene)azo))bis(4,6-dihydroxynaphthalene-2-sulphonic) acid, potassium sodium salt;2-Naphthalenesulfonic acid, 3,3'-(cyclohexylidenebis((2-methoxy-4,1-phenylene)azo))bis(4,6-dihydroxy-, potassium sodium salt