2-naphthol-5-sulfonic acid, 1-(4-sulfo-1-naphthylazo)-, disodium salt (6ci) ; fast red e ; 1-(4-sulfo-1-naphthylazo)-2-naphthol-5-sulfonic acid disodium salt ; l-red 2 ; cramoisine ; 1-naphthalenesulfonic acid, 6'-hydroxy-4,5'-azodi-, disodium salt (8ci) ; 1-naphthalenesulfonicacid, 6-hydroxy-5-[(4-sulfo-1-naphthalenyl)azo]-, disodium salt (9ci)
