Chemical Properties
orange-brown powder
Uses
Eosin Acid C.I. No. 45380 (CAS# 15086-94-9) is a photo-senseitive organic catalyst and has been used in the photocatalytic, diastereoselective additions of 1-sulfoximidoyl-1,2-benziodoxoles to styrenes, and in the stereoselective synthesis of 2-deoxyglycosides from glycals. Dyes and metabolites.
Preparation
Fluorescein (C.I. Acid Yellow 73, C.I. 45350) in water or ethanol solution bromide into four bromine derivatives, And made into a free acid form..
Definition
ChEBI: Bromoeosin is an organobromine compound. It is functionally related to a fluorescein (lactone form).
Biological Activity
Eosin Y is a xanthene dye and is used for the differential staining of connective tissue and cytoplasm. In histopathology, it is applied as a counterstain after hematoxylin and before methylene blue. It is also used as a background stain, thereby giving contrast to the nuclear stains.
Properties and Applications
brilliant yellow red. Soluble in water and ethanol for blue light red, with yellow green fluorescence. In concentrated sulfuric acid to yellow, dilution after yellow red precipitation.
