What Is Fluorescein Sodium?
Fluorescein sodium, also known as uranine, is a dark brown or orange powder, odorless and soluble in water, and ethanol, but almost insoluble in diethyl ether. It exhibits a bright yellow color in acidic conditions and fluoresces in strongly acidic or alkaline conditions.
Chemical formula: C20H10Na2O5, Molecular weight: 376.28, Melting point: 315℃, Flashpoint: 218℃, CAS number: 518-47-8.
Uses of Fluorescein Sodium
Used as a contrast agent in medical imaging, tracer in microbiology, and manufacturing as colorants, optical brighteners, and ink raw materials. Fluorescein sodium emits bright green fluorescence under specific light wavelengths.
Properties of Fluorescein Sodium
An organic sodium salt with high water solubility and fluorescence under basic conditions. Sensitive to heat and light, it should be stored in a cool, dark place.
Structure of Fluorescein Sodium
Composed of fluorescein and sodium, belonging to the xanthene family, with a chemical structure that includes three fused rings and a hetero oxygen atom.
Other Information on Fluorescein Sodium
Production Process
Produced by the dehydration-condensation reaction of phthalic anhydride and resorcinol, followed by treatment with sodium hydroxide to form the sodium salt.