121-57-3 4-Aminobenzenesulfonic acid, monosodium salt 4-Aminobenzenesulfonic acid, sodium salt 515-74-2 Benzenesulfonic acid, 4-amino-, monosodium salt CCRIS 7446 EINECS 208-208-5 Sodium sulfanilate Sodium sulphanilate Sulfanilic acid, monosodium salt