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%ما هو (من)٪ 1 - تعريف

SYNTHETIC ORGANIC COMPOUND USED AS DYE AND FLUORESCENT TRACER

Fluorescein sodium; Fluorescin; Fluoresceins; Fluorescein-5-isothiocyanate; C.I. 45350; Japan yellow 201; Angiofluor; Resorcinolphthalein; Soap yellow; Solvent yellow 94; Sodium fluorescein; Flourescein; C20H12O5; Uranine; ATC code S01JA01; ATCvet code QS01JA01; Acid Yellow 73; Funduscein-25; Uranin; Fluorescine; Uranine yellow; Sodium fluorescent; Fluorescein dye

Fluorescein

·noun A yellowish red, crystalline substance, C₂₀H₁₂O₅, produced by heating together phthalic anhydride and resorcin;

- so called, from the very brilliant yellowish green fluorescence of its alkaline solutions. It has acid properties, and its salts of the alkalies are known to the trade under the name of uranin.

fluorescein

['fl??r?si:n, -s?n, 'fl?:-]

¦ noun Chemistry an orange dye with a yellowish-green fluorescence, used as an indicator and tracer.

Fluorescin

·noun A colorless, amorphous substance which is produced by the reduction of fluorescein, and from which the latter may be formed by oxidation.

ويكيبيديا

Fluorescein

Fluorescein is an organic compound and dye based on the xanthene tricyclic structural motif, formally belonging to triarylmethine dyes family. It is available as a dark orange/red powder slightly soluble in water and alcohol. It is widely used as a fluorescent tracer for many applications.

The color of its aqueous solutions is green by reflection and orange by transmission (its spectral properties are dependent on pH of the solution), as can be noticed in bubble levels, for example, in which fluorescein is added as a colorant to the alcohol filling the tube in order to increase the visibility of the air bubble contained within (thus enhancing the precision of the instrument). More concentrated solutions of fluorescein can even appear red (because under these conditions nearly all incident emission is re-absorbed by the solution).

It is on the World Health Organization's List of Essential Medicines.

https://en.wikipedia.org/wiki/Fluorescein