Benzenemethanaminium, N-ethyl-N-[4-[[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl](2-sulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-3-sulfo-, inner salt, sodium salt (1:2)
FD&C Blue No. 1
Disodium 2-{(Z)-(4-{ethyl[(3-sulfonatophenyl)methyl]amino}phenyl)[(4Z)-4-{ethyl[(3-sulfonatophenyl)methyl]iminio}cyclohexa-2,5-dien-1-ylidene]methyl}benzene-1-sulfonate