SMILES: CC1=C(C(=O)N(N1)C2=CC(=C(C=C2Cl)S(=O)(=O)O)Cl)N=NC3=CC=C(C=C3)S(=O)(=O)O
Description: The molecule is an arenesulfonic acid that is 2,5-dichloro-4-(pyrazol-1-yl)benzene-1-sulfonic acid in which the pyrazole ring is substituted by methyl, (4-sulfophenyl)diazenyl and hydroxy groups at positions 3, 4, and 5 respctively. The disodium salt is the biological stain 'lissamine fast yellow'. It has a role as an allergen, a food colouring and a histological dye. It is a member of azobenzenes, a member of pyrazoles, a dichlorobenzene, a heteroaryl hydroxy compound and an arenesulfonic acid. It is a conjugate acid of a lissamine fast yellow(2-).