eosin

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Related to Eosin Y: Eosin B

eosin

[′ē·ə·sən]
(organic chemistry)
C20H8O5Br4
A red fluorescent dye in the form of triclinic crystals that are insoluble in water; used chiefly in cosmetics and as a toner. Also known as bromeosin; bromo acid; eosine; tetrabromofluorescein.
The red to brown crystalline sodium or potassium salt of this dye; used in organic pigments, as a biological stain, and in pharmaceuticals.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The [sup.1]H-NMR spectrum of eosin Y is given in Figure 5.
A potential mechanism for the abstraction of the caffeine C-8 proton to eosin Y is given in Figure 8.
There is a slight downfield shift in the proton peaks for eosin Y: a + bfrom 7.49 to 7.47 ppm and c 7.30 to 7.19 ppm.
Table 1 shows the chemical shifts for the eosin Y protons in the eosin Y sample and in the eosin Y-caffeine mixture sample.
To test for the presence and identity of different components in the mixture such as new products formed due to a chemical reaction between eosin Y and caffeine, or dimerization between eosin Y molecules [26], a DOSY NMR experiment was obtained.