eosin B

Eosin B is a dibromo dinitro derivative of fluorescein.

The other eosin compound is eosin B (eosin bluish or imperial red); it has a very faint bluish cast.

Differences between Leishman's and Reuter's methods were: Leishman used methanol (like Jenner) and substituted Eosin B for Eosin Y, whereas Reuter used ethyl alcohol and rightly stressed the importance of using an absolutely pure solvent.