2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis(4-hydroxy-3-((2-methyl-4-sulfophenyl)azo)-, sodium salt, compd. with 2,2',2''-nitrilotris(ethanol) 2-Naphthalenesulfonic acid, 7,7'-ureylenebis(4-hydroxy-3-((4-sulfo-o-tolyl)azo))-, sodium triethanolamine salts (1:x:x) 79255-95-1