Description

2',4',5',7'-Tetrachlorofluorescein is a halogenated derivative of fluorescein, serving as a key synthetic intermediate and a versatile dye precursor. This compound is valued for its role in producing high-purity, color-stable pigments and fluorescent tracers used in demanding analytical and industrial processes. It is essential for manufacturers and R&D laboratories in the analytical chemistry, dye and pigment, and life science research sectors seeking reliable, high-quality intermediates.

Application

• Fluorescent Tracer and Staining Agent: Used as a precursor for synthesizing sensitive fluorescent probes and biological stains for microscopy and diagnostic applications.
• Dye and Pigment Intermediate: A critical building block in the manufacture of xanthene dyes, including halogenated eosin and erythrosine derivatives, for inks, coatings, and biological indicators.
• Analytical Chemistry Reagent: Employed in the synthesis of reagents for photometric analysis, metal ion detection, and as a pH indicator in specialized formulations.
• Research & Development: Serves as a standard or starting material in organic synthesis and photochemical studies within academic and industrial R&D settings.
• Non-Destructive Testing (NDT): Can be formulated into penetrant dyes for flaw detection in industrial component inspection.

Basic Information

Product Name	2',4',5',7'-Tetrachlorofluorescein
CAS No.	2320-38-9
Molecular Formula	C20H8Cl4O5
Molecular Weight	470.09 g/mol
Synonyms	2',4',5',7'-Tetrachlorofluorescein; Tetrachlorofluorescein; 3',6'-Dihydroxy-2',4',5',7'-tetrachlorospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one; C.I. 45435; Solvent Red 140; Fluorescein, 2',4',5',7'-tetrachloro-; 2,4,5,7-Tetrachloro-3,6-fluorandiol
EINECS	219-031-4

Quality Control

Our 2',4',5',7'-Tetrachlorofluorescein is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation (IR), to ensure it meets precise specifications. A Certificate of Analysis (COA) detailing all test results is provided to guarantee traceability and compliance with your quality requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Orange to red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%

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