Also Called: 2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-[[2-( trifluoromethyl)phenyl]azo]-, monopotassium salt;2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-[[2-(trifluoromethyl)phenyl]azo]-, monopotassium salt;2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-[2-[2-(trifluoromethyl)phenyl]diazenyl]-, potassium salt (1:1)