Description

Fluorescein Sodium is a highly fluorescent, water-soluble dye belonging to the xanthene class. This compound is valued for its intense green-yellow fluorescence under blue light, making it an indispensable diagnostic and tracing agent. It is primarily utilized in the ophthalmic, biomedical, and industrial sectors for applications ranging from vital staining to leak detection.

Application

• Ophthalmic Diagnostics: As a vital stain in fluorescein angiography to assess retinal and choroidal circulation, and to detect corneal abrasions or ulcers.
• Biomedical Research: Used as a fluorescent tracer or tag in cell biology, flow cytometry, and permeability studies.
• Industrial Leak Detection: Employed as a highly visible tracer dye in plumbing, automotive cooling systems, and HVAC systems to identify leaks.
• Water Flow Studies: Applied in hydrology and environmental engineering to trace water movement, measure flow rates, and study dispersion.
• Contact Lens Fitting: Used with a cobalt blue filter to evaluate the fit of rigid gas permeable (RGP) contact lenses.
• Forensic Science: Utilized as a latent bloodstain enhancer, reacting with hemoglobin to produce fluorescence.

Basic Information

Product Name	Fluorescein Sodium
CAS No.	518-47-8
Molecular Formula	C20H10Na2O5
Molecular Weight	376.27 g/mol
Synonyms	Fluorescein Sodium Salt; Uranine; Acid Yellow 73; D&C Yellow No. 8; Soluble Fluorescein; Fluorescein Disodium Salt; 9-(o-Carboxyphenyl)-6-hydroxy-3H-xanthen-3-one disodium salt; CI 45350
EINECS	208-253-0

Quality Control

Our Fluorescein Sodium is manufactured under a quality management system and can be supplied to meet various pharmacopeial standards, including USP and EP, where applicable. Every batch undergoes rigorous analytical testing to ensure identity, purity, and performance. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep the container tightly sealed to protect from moisture.

Specification

Item	Specification
Appearance	Orange-red powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
pH (1% Solution)	7.0 - 9.0
Water (KF)	≤ 5.0%
Fluorescence	Conforms to reference
Heavy Metals	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.