Trisodium 7-aminonaphthalene-1,3,6-trisulphonate, 7-Aminonaphthalene-1,3,6-trisulphonic acid, sodium salt, 2-Naphthylamine-3,6,8 trisulfonic acid, sodium salt, 1,3,6-Naphthalenetrisulfonic acid, 7-amino-, sodium salt, risodium 7-aminonaphthalene-1,3,6-trisulfonate