C.I. Mordant Blue 9, disodium salt; 1-Naphthalenesulfonic acid, 6-(2-(5-chloro-2-hydroxy-3-sulfophenyl)diazenyl)-5-hydroxy-, sodium salt (1:2); 6-(5-Chloro-2-hydroxy-4-sulfophenylazo)-5-hydroxy-1-naphthalenesulfonic acid, disodium salt; C.I. 14855; C.I. Mordant Blue 9; Mordant Blue 9 (C.I.); sodium 6-(5-chloro-2-hydroxy-4-sulphophenylazo)-5-hydroxynaphthalene-1-sulphonate; Acid Mordant Navy Blue RRN; Acid Mordant Navy Blue RRL; disodium (6E)-6-[2-(5-chloro-2-hydroxy-3-sulfonatophenyl)hydrazinylidene]-5-oxo-5,6-dihydronaphthalene-1-sulfonate; 6-(5-Chloro-2-Hydroxy-4-Sulfophenylazo)-5-Hydroxy-1-Naphthalenesulfonic Acid Disodium Salt