Description

3',6'-Dihydroxy-3-Oxospiro[Isobenzofuran-1(3H),9'-[9H]Xanthene]-Ar-Carboxylic Acid is a high-purity, functionalized xanthene derivative, a crucial advanced intermediate in fine chemical synthesis. Its value lies in its unique spirocyclic and carboxylic acid functional groups, which enable precise molecular modifications for specialized applications. This compound is essential for research and development laboratories, pharmaceutical innovators, and manufacturers of high-performance dyes and fluorescent probes who require reliable, high-quality building blocks.

Application

• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of novel active pharmaceutical ingredients (APIs), particularly for targeted therapies.
• Fluorescent Probe & Sensor Development: Used as a core scaffold for creating sensitive and selective fluorescent dyes for bio-imaging, diagnostics, and chemical sensing.
• Advanced Material Synthesis: A building block for functional polymers, organic semiconductors, and other specialty materials requiring specific photophysical properties.
• Research & Development: Employed in academic and industrial R&D for exploring new chemical entities and reaction pathways in medicinal and materials chemistry.
• Dye & Pigment Manufacturing: Acts as an intermediate for producing high-value, specialized xanthene-based colorants with enhanced stability or functionality.

Basic Information

Product Name	3',6'-Dihydroxy-3-Oxospiro[Isobenzofuran-1(3H),9'-[9H]Xanthene]-Ar-Carboxylic Acid
CAS No.	94595-55-8
Molecular Formula	C22H12O7
Molecular Weight	388.33 g/mol
Synonyms	Spiro[isobenzofuran-1(3H),9'-[9H]xanthene]-3',6'-diol, 3-oxo-, Ar-carboxylic acid; 3-Carboxyfluorescein precursor; Functionalized Fluorescein Derivative; 3-Oxospiro[isobenzofuran-1(3H),9'-[9H]xanthene]-3',6'-diol-Ar-carboxylic acid; Advanced Xanthene Intermediate
EINECS	Contact for details

Quality Control

Our 3',6'-Dihydroxy-3-Oxospiro[Isobenzofuran-1(3H),9'-[9H]Xanthene]-Ar-Carboxylic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting standards for research and industrial use. A comprehensive Certificate of Analysis (COA) detailing purity, impurities, and physical characteristics is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Loss on Drying	≤ 2.0%
Heavy Metals	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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