Description

Uranine K CAS NO 6417-85-2 is a high-purity, water-soluble fluorescent dye belonging to the xanthene class, specifically the sodium salt of fluorescein. This compound is valued for its intense fluorescence and is a critical tracer and detection agent in numerous industrial and scientific processes. It is essential for professionals in water resource management, leak detection, biomedical research, and industrial process control who require a reliable, high-performance fluorescent marker.

Application

• Hydrological Tracer Studies: Used for tracking water flow, dispersion, and residence time in surface water, groundwater, and wastewater systems.
• Leak Detection: A key agent for identifying leaks in plumbing, industrial pipelines, swimming pools, and automotive cooling systems.
• Biomedical and Diagnostic Research: Employed as a fluorescent stain in microscopy, flow cytometry, and as a model compound in ophthalmology for angiography studies.
• Industrial Process Control: Serves as a fluorescent marker in chemical manufacturing and paper processing to monitor mixing efficiency and fluid dynamics.
• Environmental Monitoring: Applied in studies of sediment transport and as a tracer in oceanographic and limnological research.
• Forensic Science: Utilized to visualize latent patterns or to trace fluid movements in forensic investigations.

Basic Information

Product Name	Uranine K
CAS No.	6417-85-2
Molecular Formula	C20H10Na2O5
Molecular Weight	376.27 g/mol
Synonyms	Fluorescein Sodium Salt; Acid Yellow 73; D&C Yellow No. 8; Solvent Green 7; Uranine; CI 45350; Sodium Fluorescein; 2-(3-Oxo-6-oxido-3H-xanthen-9-yl)benzoic acid sodium salt
EINECS	229-146-2

Quality Control

Our Uranine K is manufactured under a strict quality management system to ensure batch-to-batch consistency and high performance. Each lot is tested to confirm identity, purity, fluorescence intensity, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing specifications and test results is provided with every shipment. We can supply grades suitable for various applications, including technical and research standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Orange-red to brownish-red powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Fluorescence Intensity	Conforms to standard
Loss on Drying	≤ 5.0%
Water Solubility	Clear, intense yellow-orange solution
pH (1% Solution)	7.0 - 9.0

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