Synonyms: sodium 5-[(5-chloro-2-hydroxyphenyl)azo]-6-hydroxynaphthalene-2-sulphonato(3-)]hydroxychromate(1-);chromate, [5-[(5-chloro-2-hydroxyphenyl)azo]-6-hydroxy-2-naphthalenesulfona;Chromate, [5-[(5-chloro-2-hydroxyphenyl)azo]-6-hydroxy-2-naphthalenesulfonato]hydroxy-, sodium;Chromate,[5-[(5-chloro-2-hydroxyphenyl)azo]-6-hydroxy-2-naphthalenesulfonato]hydroxy-,sodium;Chromate(1-), [5-[(5-chloro-2-hydroxyphenyl) azo]-6-hydroxy-2-naphthalenesulfonato(3-)]hydroxy -, sodium