Synonyms CI Food Blue 2, BRILLIANT BLUE FCF
Definition Brilliant Blue FCF consists essentially of disodium α-(4-(N-ethyl-3-sulfonatobenzylamino) phenyl)-α-(4-N-ethyl-3-sulfonatobenzylamino) cyclohexa-2,5-dienylidene) toluene-2-sulfonate and its isomers and subsidiary colouring matters together with sodium chloride and/or sodium sulfate as the principal uncoloured components.
Colour Index No 42090
Einecs 223-339-8
Chemical names Disodium α-(4-(N-ethyl-3-sulfonatobenzylamino) phenyl)-α-(4-N-ethyl-3-sulfonatobenzylamino) cyclohexa-2,5-dienylidene) toluene-2-sulfonate
Chemical formula C37H34N2Na2O9S3
Molecular weight 792,84
Synonyms CI Food Blue 1, INDIGOTINE, INDIGO CARMINE
Definition Indigotine consists essentially of a mixture of disodium 3,3′dioxo-2,2′-bi-indolylidene-5,5′-disulfonate, and disodium 3,3′-dioxo-2,2′-bi-indolylidene-5,7′-
disulfonate and subsidiary colouring matters together with sodium chloride and/or sodium sulfate as the principal uncoloured components. Indigotine is described as the sodium salt.
Class Indigoid
Colour Index No 73015
Einecs 212-728-8
Chemical names Disodium 3,3′-dioxo-2,2′-bi-indolylidene-5,5′-disulfonate
Chemical formula C16H8N2Na2O8S2
Molecular weight 466,36
Synonyms CI Food Yellow 4, TARTRAZINE
Definition Tartrazine consists essentially of trisodium 5-hydroxy-1-(4-sulfonatophenyl)-4-(4-sulfonatophenylazo)-H-pyrazole-3-carboxylate and subsidiary colouring matters
together with sodium chloride and/or sodium sulfate as the principal uncoloured components. Tartrazine is described as the sodium salt.
Class Monoazo
Colour Index No 19140
Einecs 217-699-5
Chemical names Trisodium-5-hydroxy-1-(4-sulfonatophenyl)-4-(4-sulfonatophenylazo)-Hpyrazole-3-carboxylate
Chemical formula C16H9N4Na3O9S2
Molecular weight 534,37
Synonyms CI Food Yellow 3, Orange Yellow S, SUNSET YELLOW FCF
Definition Sunset Yellow FCF consists essentially of disodium 2-hydroxy-1-(4-sulfonatophenylazo) naphthalene-6-sulfonate and subsidiary colouring matters together with
sodium chloride and/or sodium sulfate as the principal uncoloured components. Sunset Yellow FCF is described as the sodium salt.
Class Monoazo
Colour Index No 15985
Einecs 220-491-7
Chemical names Disodium 2-hydroxy-1-(4-sulfonatophenylazo)naphthalene-6-sulfonate
Chemical formula C16H10N2Na2O7S2
Molecular weight 452,37
Synonyms CI Food Red 14, ERYTHROSINE
Definition Erythrosine consists essentially of disodium 2-(2,4,5,7-tetraiodo-3-oxido-6-oxoxanthen-9-yl) benzoate monohydrate and subsidiary colouring matters together
with water, sodium chloride and/or sodium sulfate as the principal uncoloured components. Erythrosine is described as the sodium salt.
Class Xanthen
Colour Index No 45430
Einecs 240-474-8
Chemical name Disodium 2-(2,4,5,7-tetraiodo-3-oxido-6-oxoxanthen-9-yl)benzoate monohydrate
Chemical formula C20H6I4Na2O5.H2O
Molecular weight 897,88
Synonyms CI Food Red 17, ALLURA RED AC
Definition Allura Red AC consists essentially of disodium 2-hydroxy-1-(2-methoxy-5-methyl-4-sulfonato-phenylazo) naphthalene-6-sulfonate and subsidiary colouring matters together with sodium chloride and/or sodium sulfate as the principal uncoloured components. Allura Red AC is described as the sodium salt.
Class Monoazo
Colour Index No 16035
Einecs 247-368-0
Chemical name Disodium 2-hydroxy-1-(2-methoxy-5-methyl-4-sulfonatophenylazo)naphthalene-6-sulfonate
Chemical formula C18H14N2Na2O8S2
Molecular weight 496,42
