Description

2',4',5',7'-Tetrabromo-3',6'-Dihydroxy-3-Oxo-3H-Spiro-[Isobenzofuran-1,9'-Xanthene]-6-Carboxylic is a halogenated xanthene derivative, a high-purity synthetic intermediate of significant commercial importance. Its complex, functionalized structure makes it a critical precursor for the synthesis of specialized dyes, pigments, and analytical reagents. This compound is essential for manufacturers and R&D laboratories in the fine chemicals, colorant, and life science sectors seeking reliable, high-quality building blocks for advanced material development.

Application

• Key Intermediate for Fluorescent Dyes & Probes: Serves as a crucial precursor in synthesizing brominated fluorescein and rhodamine derivatives used in biological staining and fluorescence microscopy.
• Specialty Pigment Synthesis: Used in the development of high-performance, halogenated organic pigments with enhanced lightfastness and thermal stability for industrial coatings and plastics.
• Analytical Reagent Manufacturing: Employed in the production of reagents and indicators for chemical analysis and diagnostic applications.
• Pharmaceutical Intermediate: Acts as a sophisticated building block in the research and development of novel active pharmaceutical ingredients (APIs) and diagnostic agents.
• Material Science Research: Utilized in academic and industrial R&D for creating novel functional materials, including photoactive polymers and sensors.
• Quality Control Reference Standard: Supplied as a high-purity analytical standard for method development and verification in chemical and pharmaceutical quality control laboratories.

Basic Information

Item	Details
Product Name	2',4',5',7'-Tetrabromo-3',6'-Dihydroxy-3-Oxo-3H-Spiro-[Isobenzofuran-1,9'-Xanthene]-6-Carboxylic
CAS No.	3561-24-8
Molecular Formula	C21H8Br4O7
Molecular Weight	691.91 g/mol
Synonyms	2',4',5',7'-Tetrabromofluorescein; Tetrabromofluorescein; Acid Red 92; C.I. 45410; Eosin Y Free Acid; Eosine; Bromoeosine; D&C Red No. 22 (Free Acid); 3',6'-Dihydroxy-2',4',5',7'-tetrabromospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one-6-carboxylic acid
EINECS	222-617-4

Quality Control

Our production of 2',4',5',7'-Tetrabromo-3',6'-Dihydroxy-3-Oxo-3H-Spiro-[Isobenzofuran-1,9'-Xanthene]-6-Carboxylic adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation (IR, NMR), to ensure it meets exacting specifications for use as a fine chemical intermediate. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance with your quality requirements.

Storage

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

Specification

Item	Specification
Appearance	Red to reddish-brown powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0 %
Residue on Ignition	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm

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