1-Naphthalenesulfonicacid, 6(or 7)-[2-(2-hydroxy-1-naphthalenyl)diazenyl]-, sodium salt (1:1)
1-Naphthalenesulfonicacid, 6(or 7)-[(2-hydroxy-1-naphthalenyl)azo]-, monosodium salt (9CI); C.I.Acid Red 9 (7CI,8CI); Acid Red 9; C.I. 15635; Neutral Red PS; Silk Scarlet;Silk Scarlet N