acid red 27; amaranth; C.I. 16185; E123; FD&C red 2; food red 9; 3-hydroxy-4-[(4-sulfo-1-naphthalenyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt; 1-(4-sulfo-1-naphthylazo)-2-hydroxy-3,6-naphthalenedisulfonic acid trisodium salt; 1'-(4-sulfo-1-naphthylazo)-2'-hydroxy-3',6'-naphthalenedisulfonic acid trisodium salt; trisodium 3-hydroxy-4-(4-sulfonato-1-naphthylazo)-2,7-naphthalenedisulfonate; trisodium (4E)-3-oxo-4-[2-(4-sulfonatonaphthalen-1-yl)hydrazin-1-ylidene]-3,4-dihydronaphthalene-2,7-disulfonate |