| zincon, monosodium salt monohydrate |
| Zincon sodium salt |
| 2-[5-(2-Hydroxy-5-sulfophenyl)-3-phenyl-1-formazyl]benzoic acid sodium salt |
| 2-Carboxy-2'-hydroxy-5'-sulfoformazylbenzene Sodium Salt |
| 2-[1-(2-hydroxy-5-sulfophenyl)-3-phenyl-5-formazano]-benzoic aci monosodium |
