Brilliant Blue Food Color Additive mainly comprises toluene-2-sulfonate, disodium alpha-(4-(N-ethyl-3-sulfonatobenzylamino) phenyl)-alpha-(4-N-ethyl-3-sulfonatobenzylamino, cyclohexa-2,5-dienylidene) as well as its subsidiary coloring matters and isomers in combination with sodium chloride/sodium sulfate as principal uncolored component. The organic compounds it contains other than coloring matters include combination of 2-, 3- and 4-formyl benzene sulfonic acids (Not more than 1.5%) and 3((ethyl)(4-sulfophenyl)amino) methyl benzene sulfonic acid (Not more than 0.3%).