2-Naphthalenesulfonic acid, 7-(benzoylamino)-4-hydroxy-3-((4-((4-sulfophenyl)azo)phenyl)azo)-, compd. with 2,2',2''-nitrilotris(ethanol) (1:2) 7-Benzamido-4-hydroxy-3-((p-((p-sulfophenyl)azo)phenyl)azo)-2-naphthalenesulfonic acid, triethanolamine salt (1:2) 75768-93-3 C.I. Direct Red 81, triethanolamine salt