4,4'-Diisothiocyano-1,2-diphenylethane-2,2'-disulfonate 4,4'-Diisothiocyano-2,2'-dihydrostilbene disulfonic acid 61481-03-6 Benzenesulfonic acid, 2,2'-(1,2-ethanediyl)bis(5-isothiocyanato- Dihydro-4,4'-diisothiocyanostilbene-2,2'-disulfonic acid Dihydro-dids Dihydrodids H(2)DIDS H2DIDS