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. 2019 Nov 14;5(11):e02711. doi: 10.1016/j.heliyon.2019.e02711

Table 5.

Chemical structure and λmax of some xanthene dyes.

Dyes Chemical structure λmax (nm)
Fluorescein: R1 = R2 = H Image 11 480–500
Dibromofluorescein: R1 = H, R2 = Br 490–510
Eosin Y: R1 = R2 = Br 510–530
Erythrosine B: R1 = R2 = I 520–540