27816-59-7 4-Acetamido-4'-isothiocyanostilbene-2,2'-disulfonic acid, disodium salt 51023-76-8 Benzenesulfonic acid, 5-(acetylamino)-2-(2-(4-isothiocyanato-2-sulfophenyl)ethenyl)-, disodium salt Disodium 5-acetamido-2-(2-(4-isothiocyanato-2-sulphonatophenyl)vinyl)benzenesulphonate EINECS 256-919-4 SITS