Photoresist Chemicals 7,7-(Carbonyldiimino)bis(4-hydroxy-3-((6-sulpho-2-naphthyl)azo)naphthalene-2-sulphonic) acid, potassium sodium salt Cas：93840-37-0 Molecular Formula：7,7-(Carbonyldiimino)bis(4-hydroxy-3-((6-sulpho-2-naphthyl)azo)naphthalene-2-sulphonic) acid, potassium sodium salt