Description

3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-5-carboxylic acid compound with 3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxylic acid (1:1) is a high-purity, complex organic compound belonging to the xanthene dye family, specifically a derivative of fluorescein. This compound is valued for its precise molecular structure and consistent performance as a key intermediate or active component in advanced chemical synthesis. It is primarily sought after by research institutions and industrial manufacturers in the pharmaceutical, diagnostic, and specialty chemical sectors for developing novel products.

Application

• Pharmaceutical Intermediate: Serves as a critical building block in the synthesis of active pharmaceutical ingredients (APIs) and novel drug candidates.
• Fluorescent Probe & Dye Synthesis: Used in the development of high-performance fluorescent dyes, markers, and probes for biological imaging and diagnostic assays.
• Analytical Chemistry Reagent: Employed as a standard or reagent in chromatographic analysis and spectroscopic studies due to its defined properties.
• Bioconjugation: Acts as a linker or tag in the conjugation of biomolecules for research and diagnostic applications.
• Material Science Research: Investigated for use in the development of advanced organic materials, including sensors and optoelectronic devices.
• Chemical Synthesis: Utilized as a specialized intermediate in organic synthesis for creating complex molecular architectures.

Basic Information

Product Name	3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-5-carboxylic acid compound with 3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxylic acid (1:1)
CAS No.	1171493-85-8
Molecular Formula	C28H16O10 • C28H16O10
Molecular Weight	952.80 g/mol (for the compound mixture)
Synonyms	Fluorescein dicarboxylic acid isomer mixture; 5(6)-Carboxyfluorescein isomer mixture; 5- and 6-Carboxyfluorescein (1:1); 5(6)-FAM acid; 5(6)-Carboxyfluorescein, mixed isomers; 3',6'-Dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthene]-5(6)-carboxylic acid mixture; CAS 1171493-85-8
EINECS	Contact for details

Quality Control

Our production of this specialty chemical adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. A Certificate of Analysis (COA) detailing specific test results is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed in a low-humidity environment to maintain stability and prevent degradation.

Specification

Item	Specification
Appearance	Orange to red powder
Identification (HPLC)	Conforms
Identification (IR)	Conforms
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Residue on Ignition	≤ 0.5%

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