Fluorescein Sodium CAS 518-47-8

CAS: 518-47-8

Molecular Formula: C20H13NaO5

Molecular Weight: 356.31

EINECS: 208-253-0

Synonyms: INTERNAL REFERENCE DYE, FLUORESCEIN BASE; FLUORESCEIN SODIUM 8-12% AQUEOUS*SOLUTION; FLUORESCEIN DISODITM SALT FOR FLUORESCENCE C.I. NO. 45350; FLUORESCEIN DISODIUM SALT ULTRA PURE 98+% (C.I. 45350); FLUORESCEIN SODIUM TECHNICAL DYE (C.I. 45350)

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What is Fluorescein Sodium CAS 518-47-8?

Fluorescein Sodium is odorless and hygroscopic. Dissolved in water, the solution appears yellow red with strong yellow green fluorescence, disappears after acidification, reappears after neutralization or alkalization, slightly soluble in ethanol, almost insoluble in chloroform and ether. Water solution is isotonic with plasma.

Specification

Item	Specification
Density	0.579[at 20℃]
Melting point	320 °C
Vapor pressure	2.133hPa
Storage conditions	Store at +5°C to +30°C.
pKa	2.2, 4.4, 6.7(at 25℃)
PH	8.3 (10g/l, H2O, 20℃)

Application

Fluorescein Sodium is used as a fluorescent tracer to study the permeability of the blood-brain barrier (BBB) and blood-brain barrier (BSCB) in rodent models. Using this dye as a probe substrate, the liver cell drug transport mediated by organic anion transport peptide (OATP) was studied.