Monopotassium 2-naphthol-6,8-disulfonate

7-hydroxy-1,3-naphthalenesulfonic acid, potassium salt

3-naphthalenedisulfonic acid, 7-hydroxy- potassiumsalt

3-naphthalenedisulfonic acid, 7-hydroxy- potassium salt

1,3-Naphthalenedisulfonic acid,7-hydroxy-,potassium salt

7-hydroxynaphthalene-1,3-disulphonic acid, potassium salt