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| BRILLIANT BLUE FCF |
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SYNONYMS
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BRILLIANT BLUE FCF * C. I. FOOD BLUE 2 * FD & C BLUE 1 * ACID BLUE 9
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| DEFINITION |
Brilliant Blue FCF consists essentially of disodium alpha-(4-(N-ethyl-3-sulfonatobenzylamino) phenyl)-alpha-(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.
Brilliant Blue FCF is described as the sodium salt. The calcium and the potassium salt are also permitted. |
| CLASS |
Triarylmethane |
| COLOUR INDEX NO. |
42090 |
| EEC NUMBER |
E-133 |
| EINECS |
223-339-8 |
CHEMICAL NAMES
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Disodium alpha -(4-(N-ethyl-3-sulfonatobenzylamino) phenyl)-alpha-(4-N-ethyl-3-sulfonatobenzylamino, cyclohexa-2,5-dienylidene) toluene-2-sulfonate |
| CHEMICAL FORMULA |
C37H34N2Na2O9S3 |
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| MOLECULAR WEIGHT |
792.84 |
| ASSAY |
Content not less than 85% total colouring matters, calculated as the sodium salt; E 1% 1cm 630 at ca 630 nm |
| DESCRIPTION |
Reddish-blue powder |
IDENTIFICATION
a. Spectrometry
b. Blue solution in water |
Maximum in water at ca 630 nm |
| PURITY |
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| Water Insoluble matter |
Not more than 0.2% |
| Subsidiary colouring matters |
Not more than 6.0% |
Organic compounds other than colouring matters
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[Sum of 2-, 3- and 4-formyl benzene sulfonic acids] - Not more than 1.5% [3((ethyl)(4-sulfophenyl)amino) methyl benzene sulfonic acid] - Not more than 0.3% |
| Leuco base |
Not more than 5.0% |
| Unsulfonated primary aromatic amines |
Not more than 0.01% (Calculated as aniline) |
| Ether extractable matter |
Not more than 0.2% at pH7 |
| Arsenic |
Not more than 3 mg/kg. |
| Lead |
Not more than 10 mg/kg. |
| Mercury |
Not more than 1 mg/kg. |
| Cadmium |
Not more than 1 mg/kg. |
| Heavy metals (as Pb) |
Not more than 40 mg/kg. |
