53669-45-7

Thoron I 1-(o-Arsonophenylazo)-2-naphthol-3,6-disulfonic acid,sodium salt 1-(o-Arsonophenylazo)-2-naphthol-3,6-disulfonic acid, sodium salt trisodium 4-[(o-arsonophenyl)azo]-3-oxidonaphthalene-2,7-disulphonate 2,7-Naphthalenesulfonic acid,4-(2-arsonophenyl)azo)-3-hydroxy-,trisodium salt 2,7-Naphthalenesulfonic acid, 4-(2-arsonophenyl)azo)-3-hydroxy-, trisodium salt 2,7-Naphthalenedisulfonic acid, 4-(2-arsonophenyl)azo-3-hydroxy-, trisodium salt