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eosin
(redirected from Acid Red 87)

    Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
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.
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