ETHYL EOSIN

Synonym(s):2′,4′,5′,7′-Tetrabromoeosin ethyl ester potassium salt;Eosin alcohol soluble;Solvent Red 45

CAS NO.：6359-05-3
Empirical Formula: C22H13Br4KO5
Molecular Weight: 716.06
MDL number: MFCD00005039
EINECS: 228-793-0
SAFETY DATA SHEET (SDS)
Update Date: 2026-01-13 11:26:59

What is ETHYL EOSIN?

Chemical properties

red to brown powder

The Uses of ETHYL EOSIN

Ethyl eosin is a histological stain that has been used in the Stoval and Black method for illustrating Negri bodies in the central nervous system of rabid animals. Dyes and metabolites.

What are the applications of Application

Ethyl eosin is a histological stain used in the Stoval and Black method for illustrating Negri bodies in the central nervous

Definition

ChEBI: An organic potassium salt having 2,4,5,7-tetrabromo-9-{2-[(ethyloxy)carbonyl]phenyl}-3-oxo-3H-xanthen-6-olate as the counterion.

Preparation

Fluorescein (C.I. Acid Yellow 73, C.I. 45350) in water or ethanol solution bromide into four bromine derivatives, and then into sodium salt, then product (C.I. Acid Red 87) ethyl ester and translated into potassium.

Properties and Applications

brilliant blue light red. Slightly soluble in hot water for cherry red, with weak green yellow fluorescence, slightly soluble in ethanol to red, with brown light yellow fluorescence. In concentrated sulfuric acid to yellow, dilution after brown light yellow precipitation.

Standard	Light Fastness	Heat-resistant(℃)		water	Sodium Carbonate(5%)	Hydrochloric acid(5%)
		Melting point	Stable
ISO	Poor			Dissole	Good	Good

Properties of ETHYL EOSIN

Melting point:	>200℃
solubility	Soluble in hot water; slightly soluble in ethanol
Colour Index	45386
form	crystals or powder
color	Red-brown
Water Solubility	Freely soluble
λmax	532 nm
Biological Applications	Drug delivery and tissue engineering; photodynamic therapy; dental materials; treating cancer,diabetes; wound dressing materials