Eosin Y (water-soluble) / water-soluble eosin / eosin / eosin sodium salt / yellow eosin

English name：Eosin Y sodium salt water soluble；Eosin Y water soluble；Bromofluorescein；Bronze bromo ES；
Bromofluoresceic acid；Bromoeosine；Acid red 87；2′,4′,5′,7′-Tetrabromofluorescein disodium salt；Eosin(water soluble)；Eosin

Other names: Eosin Y (water soluble); Water soluble eosin; Towards red; Tetrabromofluorescein disodium; Eosin sodium salt; Tetrabromofluorescent yellow; Eosin denatured methylene blue; Yellow light eosin; Eosin yellowish; Acid red 87; 2 ', 4', 5 ', 7' - tetrabromo-3 ', 6' - dihydroxyspiro [isophenylpropylfuran-1 (3H), 9 '(9h) - zhanton] - 3-one disodium salt

CAS No.: 17372-87-1

C20H6Br4Na2O5=691.85

Grade: BS

Content: ≥ 85.0%

λ max：515～518

Physicochemical properties: red with blue light crystal or brown powder, easily soluble in water, slightly soluble in alcohol, insoluble in ether, concentrated aqueous solution is dark brown red, its dilute solution (1:500) is yellow red, showing green fluorescence, and the alcohol solution has strong green fluorescence. The maximum absorption wavelength is 517nm. Low toxicity, half lethal dose (mouse, oral) 2344mg / kg

Purpose: biochemical research. It is used as a biological stain for staining peptides and proteins, protoplasm, alkaline phosphatase, etc. Photometric determination of silver (sub microgram). Wright stain is a component of Wright stain, which is used to identify blood cells. It is also used as an adsorption indicator to titrate bromine, iodine and fluorine plasma. It is used as a chromogenic agent for the determination of Ag +, Pb2 +, Mn2 +, Zn2 +, etc. by fluorescence spectrophotometry

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