The molecule is an organoiodine compound that is the ring opened tautomer of fluorescein substituted at positions 2, 4, 5 and 7 by iodo groups. It has a role as a fluorescent dye. It is a xanthene dye, an organoiodine compound, a member of phenols and a member of benzoic acids. It derives from a fluorescein. It is a conjugate acid of an erythrosin(2-).
2-(3-hydroxy-2,4,5,7-tetraiodo-6-oxo-4a,9a-dihydroxanthen-9-yl)benzoic acid