2-Naphthalenesulfonic acid, 4-hydroxy-7-((((5-hydroxy-6-((2-methoxyphenyl)azo)-7-sulfo-2-naph- thalenyl)amino)carbonyl)amino)-3-((2-methyl-4-sulfophenyl)azo) 6420-44-6 (TRISODIUM SALT) AIDS-030521 AIDS030521 Amanil Fast Scarlet 4BA C.I. 29185 C.I. Direct Red 24, (*Trisodium salt*) NSC47764 (TRISODIUM SALT)