5-nitro-1-naphthalenesulphonic acid, 5-nitro-naphthalene-1-sulfonic acid, 5-Nitronaphthalene-1-sulphonic acid, EINECS 241-518-9, 1-Naphthalenesulfonicacid,5-nitro, 1-nitro-5-naphthalenesulfonic acid, 5-Nitro-naphthalin-1-sulfonsaeure, 1-nitronaphthalene-5-sulfonic acid, 1-nitronaphthalene-5-sulphonic acid