1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-((4-sulfo-1-naphthalenyl)azo)-, potassium sodium salt 7-Hydroxy-8-((4-sulpho-1-naphthyl)azo)naphthalene-1,3-disulphonic acid, potassium sodium salt 83006-79-5 Compound EINECS 280-129-9