Material Safety Data sheet:
MSDS - Eosin Y, 1%

Eosin Y stain is a general biological stain for highlighting cytoplasm material in various tissue specimens. The acidic nature of Eosin Y stains basic parts of the cell, like the cytoplasm, pink-orange, making it a good counter-stain with methylene blue. Eosin Y stain can also be substituted for Congo Red stain or Neutral Red stain. This Eosin Y 1% stain is an aqueous solution and comes in 25 mL Dropper bottle.  

1. Used as a general biological stain
2. Can be substituted for Congo Red stain or Neutral Red stain