Erythrosine

2',4',5',7'-Tetraiodofluorescein; Erythrosin; Erythrosin B; Erythrosine B; F D & C #3; FDC Red No. 3
A tetraiodofluorescein used as a red coloring in some foods (cherries, fish), as a disclosure of DENTAL PLAQUE, and as a stain of some cell types. It has structural similarity to THYROXINE.