SYNONYMS	BRILLIANT BLUE FCF * C. I. FOOD BLUE 2 * FD & C BLUE 1 *
	ACID BLUE 9
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	Disodium alpha -(4-(N-ethyl-3-sulfonatobenzylamino) phenyl)-alpha-(4-N-ethyl-3-sulfonatobenzylamino, cyclohexa-2,5-dienylidene) toluene-2-sulfonate
CHEMICAL FORMULA	C37H34N2Na2O9S3
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	Maximum in water at ca 630 nm
b. Blue solution in water
PURITY	Not more than 0.2%
Water Insoluble matter
Subsidiary colouring matters	Not more than 6.0%
Organic compounds other than colouring matters	[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.