Synonym:   4′,5′-Dibromo-2′,7′-dinitrofluorescein disodium salt, Acid Red 91, Eosin Scarlet, Eosin bluish, Saffrosine

CAS Number: 548-24-3

Linear Formula: C20H6N2O9Br2Na2

Molecular Weight: 624.06

Colour Index Number: 45400

EC Number: 208-943-1

MDL number: MFCD00005041

NACRES: NA.47

Eosin B has been used for the histological analysis of anal sphincter sections obtained from rats.It has been used along with Mayer′s hematoxylin for the staining of triangularis sterni muscle sections. It has been used along with hematoxylin for the staining of different tissue sections obtained from mouse.

Dye used for dyeing wool, cotton and paper, as well as in histology for staining cells. Red-brown powder, easily soluble in water. Upon dissolution, it forms a yellowish-red solution with weak greenish fluorescence. The fluorescence intensity increases many times when dissolved in an organic solvent such as dimethyl sulfoxide (dimexide), dimethylformamide.