2,2'-Disulfo-4,4'-stilbenediamine 2,2'-Stilbenedisulfonic acid, 4,4'-diamino- 4,4'-Diamino-2,2'-stilbenedisulfonic acid 81-11-8 Amsonic acid Benzene, 1,1'-(1,2-ethenediyl)bis-, diamino disulfo deriv. Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-amino- DASD Diamino stilbene disulfonic acid Flavonic acid NSC163 Tinopal BHS p,p'-Diaminodiphenylethylene-o,o'-disulfonic acid p,p'-Diaminostilbene-o,o'-disulfonic acid