Eosin Y Disodium Salt, Certified  

Eosin Y is a xanthene dye and is used for the differential staining of connective tissue and cytoplasm. In histology, it is applied as a counterstain after hematoxylin.

Specifications:

Synonyms:                                                     Acid Red 87; C.I. 45380; 

                                                                        2’4’5’7’-Tetrabromofluorescein, disodium salt

CAS No.:                                                         17372-87-1

Chemical Formula:                                       C20H6Br4Na2O5

Formula Weight:                                           691.85

Description:                                                   Dark red-brown (rust) powder

Identification (IR):                                         To conform to standard

Assay:                                                             > 88%

Solubility:                                                       Clear, yellow-orange to red solution

(0.25%, in water)

Loss on drying:                                              < 5%

Certification:                                                 Certified by the Biological Stains Commission (BSC)