Fluorescein Sodium

Molecular Formula
C20H10Na2O5
Catalog Number
F1272
Supplier/Brand
Spectrum Chemical
CAS Number
518-47-8

Fluorescein Sodium is a synthetic organic compound that is a common fluochrome dye. It is obtained from the condensation of phthalic anhydride with resorcinol on heating. It is used in dying silk and wool, ink manufacturing, in coloring cosmetics, and in coloring gasoline and as a toner. It is widely used as a fluorescent tracer for many applications. It appears as a yellowish (yellowish-red) to red solid crystalline powder that is soluble in acetone, methanol, hot alcohol, glacial acetic acid, alkali hydroxides, carbonates and water. Ungraded products supplied by Spectrum are indicative of a grade suitable for general industrial use or research purposes and typically are not suitable for human consumption or therapeutic use.


Synonyms: Fluorescein Disodium ; Acid Yellow 73 Sodium Salt ; Resorcinolphthalein Sodium

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2023