Synonyms CI Food Blue 2
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
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 Red 17
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
Synonyms CI Food Yellow 4
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
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
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 Brown 3
Definition Brown HT consists essentially of disodium 4,4′-(2,4-dihydroxy-5-hydroxymethyl-1,3-phenylene bisazo) di (naphthalene-1-sulfonate) and subsidiary colouring matters together with sodium chloride and/or sulfate as the principal uncoloured components. Brown HT is described as the sodium salt.
Class Bisazo
Colour Index No 20285
Einecs 224-924-0
Chemical names Disodium 4,4′-(2,4-dihydroxy-5-hydroxymethyl-1,3-phenylene bisazo)di(naphthalene-1-sulfonate)
Chemical formula C27H18N4Na2O9S2
Molecular Weight 652,57
Synonyms CI Food Blue 5
Definition Patent Blue V consists essentially of the calcium or sodium compound of [4-(α-(4-diethylaminophenyl)-5-hydroxy-2,4-disulfophenyl-methylidene)2,5-cyclohexadien-1-ylidene] diethylammonium hydroxide inner salt and subsidiary colouring matters together with sodium chloride and/or sodium sulfate and/or calcium sulfate as the principal uncoloured components.
Class Triarylmethane
Colour Index No 42051
Einecs 222-573-8
Chemical names The calcium or sodium compound of [4-(α-(4-diethylaminophenyl)-5-hydroxy-2,4-disulfophenyl-methylidene) 2,5-cyclohexadien-1-ylidene] diethyl-ammonium hydroxide inner salt
Chemical formula : C27H31N2O7S2Na
Molecular weight : 582,67
Synonyms CI Food Green 4, Brilliant Green BS
Definition Green S consists essentially of sodium N-[4-(dimethylamino)phenyl] 2-hydroxy-3,6-disulfo-1-naphthalenyl)methylene]-2,5-cyclohexadien-1-ylidene]-N-methylmethanaminium
and subsidiary colouring matters together with sodium chloride and/or sodium sulphate as the principal uncoloured compounds. Green S is described as the sodium salt.
Class Triarylmethane
Colour Index No 44090
Einecs 221-409-2
Chemical names Sodium N-[4-[[4-(dimethylamino)phenyl](2-hydroxy-3,6-disulfo-1-naphthalenyl)-methylene]2,5-cyclohexadien-1-ylidene]-N-methylmethanaminium;
Sodium 5-[4-dimethylamino-α-(4-dimethyliminocyclohexa-2,5-dienylidene) benzyl]-6-hydroxy-7-sulfonato-naphthalene-2-sulfonate (alternative chemical name).
Chemical formula C27H25N2NaO7S2
Molecular Weight 576,63
Synonyms CI Food Red 3
Definition Azorubine consists essentially of disodium 4-hydroxy-3-(4-sulfonato-1-naphthylazo) naphthalene-1-sulfonate and subsidiary colouring matters together with sodium chloride and/or sodium sulfate as the principal uncoloured components. Azorubine is described as the sodium salt.
Class Monoazo
Colour Index No 14720
Einecs 222-657-4
Chemical name Disodium 4-hydroxy-3-(4-sulfonato-1-naphthylazo) naphthalene-1-sulfonate
Chemical formula C20H12N2Na2O7S2
Molecular weight 502,44
Synonyms CI Food Red 9
Definition Amaranth consists essentially of trisodium 2-hydroxy-1-(4-sulfonato-1-naphthylazo) naphthalene-3,6-disulfonate and subsidiary colouring matterstogether with sodium chloride and/or sodium sulfate as the principal uncoloured components. Amaranth is described as the sodium salt.
Class Monoazo
Colour Index No 16185
Einecs 213-022-2
Chemical name Trisodium 2-hydroxy-1-(4-sulfonato-1-naphthylazo) naphthalene-3,6-disulfonate
Chemical formula C20H11N2Na3O10S3
Molecular weight 604,48
Synonyms CI Food Red 7, New Coccine
Definition Ponceau 4R consists essentially of trisodium 2-hydroxy-1-(4-sulfonato-1-naphthylazo) naphthalene-6,8-disulfonate and subsidiary colouring matters together with sodium chloride and/or sodium sulfate as the principal uncoloured components. Ponceau 4R is described as the sodium salt.
Class Monoazo
Colour Index No 16255
Einecs 220-036-2
Chemical name Trisodium 2-hydroxy-1-(4-sulfonato-1-naphthylazo) naphthalene-6,8-disulfonate
Chemical formula C20H11N2Na3O10S3
Molecular weight 604,48
Synonyms CI Food Yellow 13
Definition Quinoline Yellow is prepared by sulfonating 2-(2-quinolyl) indan-1,3-dione. Quinoline Yellow consists essentially of sodium salts of a mixture of disulfonates (principally), monosulfonates and trisulfonates of the above compound and subsidiary colouring matters together with sodium chloride and/or sodium sulfate as the principal uncoloured components. Quinoline Yellow is described as the sodium salt.
Class Chinophthalone
Colour Index No 47005
Einecs 305-897-5
Chemical name The disodium salts of the disulfonates of 2-(2-quinolyl) indan-1,3-dione (principal component)
Chemical formula C18H9N Na2O8S2 (principal component)
Molecular weight 477,38 (principal component)
Synonyms CI Food Black 1
Definition Brilliant Black BN consists essentially of tetrasodium-4-acetamido-5-hydroxy-6-[7-sulfonato-4-(4-sulfonatophenylazo)-1-naphthylazo] naphthalene-1,7-disulfonate and subsidiary colouring matters together with sodium chloride and/or sodium sulfate as the principal uncoloured components. Brilliant Black BN is described as the sodium salt.
Class Bisazo
Colour Index No 28440
Einecs 219-746-5
Chemical names Tetrasodium-4-acetamido-5-hydroxy-6-[7-sulfonato-4-(4-sulfonatophenylazo)-1-naphthylazo] naphthalene-1,7-disulfonate
Chemical formula C28H17N5Na4O14S4
Molecular weight 867,69
