COOCH3 



(An acid dye; absorption maxima about 520, [It.85.5] ) 



ETHYL EOSIN C. I. NO. 770 



Synonyms: Eosin, alcohol soluble. Eosin S. 

 This is similar to methyl eosin, but is the ethyl ester: 



Br Br 



I 



NaO 



Br 



Br 



"COOCH.CH3 



{An acid dye; absorption maxima about 523.5, [Ji-87] ) 



An alcohol soluble eosin, either this dye or the preceding, is a 

 valuable counterstain after Delafield's haematoxylin in general 

 animal histology. 



EOSIN, BLUISH 



C. I. NO. 771 



Synonyms: Eosin BN, J5, BW, or DKV. Saf rosin, Eosin scarlet 

 B or BB. Scarlet J, J J, V. Nopalin G. Caesar red. 



This is a dibrom derivative of dinitro-fluorescein. 



Br Br 



NaO I I 



O /\_0 



NO2 



NO, 

 "COONa 



{An acid dye; absorption maxima about 521.5, {Ji-86\ ) 



80 



