5-(((8-Hydroxy-3,6-disulpho-1-naphthyl)amino)sulphonyl)salicylic acid 5-(3'-Carboxy-4'-hydroxybenzenesulfonamido)-4-hydroxy-2,7-naphthalenedisulfonic acid 68003-34-9 Benzoic acid, 2-hydroxy-5-(((8-hydroxy-3,6-disulfo-1-naphthalenyl)amino)sulfonyl)- EINECS 268-118-7