Description

Spiro[Isobenzofuran-1(3H),9'-[9H]Xanthen]-3-One, 3',6'-Dihydroxy-5-Mercapto- is a specialized spirocyclic organic compound with a unique xanthene-based molecular framework. This compound is valued for its functional groups, including hydroxyl and mercapto moieties, which make it a versatile intermediate for advanced chemical synthesis. It is primarily sought by research and development teams in the pharmaceutical and fine chemical sectors for applications in material science, dye chemistry, and as a building block for complex molecular architectures.

Application

• Key intermediate in the synthesis of novel fluorescent dyes and probes for bioimaging and diagnostics.
• Building block for advanced material science applications, including the development of functional polymers and organic semiconductors.
• Precursor in pharmaceutical research for creating complex heterocyclic compounds with potential biological activity.
• Used in analytical chemistry as a reagent or a standard for method development and validation.
• Research chemical in academic and industrial laboratories for exploring new organic reactions and photophysical properties.
• Potential component in the development of sensors due to its specific functional group reactivity.

Basic Information

Product Name	Spiro[Isobenzofuran-1(3H),9'-[9H]Xanthen]-3-One, 3',6'-Dihydroxy-5-Mercapto-
CAS No.	84461-60-9
Molecular Formula	C20H12O5S
Molecular Weight	364.37 g/mol
Synonyms	5-Mercaptofluorescein; 3',6'-Dihydroxy-5-mercaptospiro[isobenzofuran-1(9H),9'-[9H]xanthen]-3-one; 5-Thiofluorescein; Fluorescein-5-thiol; 5-SH-Fluorescein; 5-Mercapto-3',6'-dihydroxyfluoran; Thiofluorescein derivative; Contact for additional synonyms.
EINECS	Contact for details

Quality Control

Our Spiro[Isobenzofuran-1(3H),9'-[9H]Xanthen]-3-One, 3',6'-Dihydroxy-5-Mercapto- is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for research and industrial use. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its sensitivity to oxidation, it is recommended to handle under an inert atmosphere for long-term storage and to minimize headspace in opened containers.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Purity (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.