eosin (redirected from Acid Red 87)

e·o·sin  (-sn)

n.

1. A red crystalline powder, C₂₀H₈O₅Br₄, used in textile dyeing and ink manufacturing and in coloring gasoline.

2. The red sodium or potassium salt of this powder, used in biology to stain cells.

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[Greek s, dawn (from its color); see aus- in Indo-European roots + -in.]

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eosin [ˈiːəʊsɪn], eosine [ˈiːəʊsɪn -ˌsiːn]

n

1. (Chemistry / Elements & Compounds) Also called bromeosin a red crystalline water-insoluble derivative of fluorescein. Its soluble salts are used as dyes. Formula: C₂₀H₈Br₄O₅

2. (Clothing, Personal Arts & Crafts / Dyeing) any of several similar dyes

[from Greek ēōs dawn + -in; referring to the colour it gives to silk]

eosinic  adj

eosin-like  adj

Thesaurus

Noun

1.

eosin - a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures bromeosin fluorescein, fluoresceine, fluorescent dye, resorcinolphthalein - a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)