Description

Isatin-5-Sulfonic Acid Sodium Salt is a high-purity, water-soluble derivative of isatin, a versatile heterocyclic building block. This compound is valued for its role as a key synthetic intermediate in the production of specialized dyes, pharmaceuticals, and advanced organic materials. It is primarily sought by research institutions and industrial manufacturers in the pharmaceutical, fine chemical, and specialty dye sectors for developing novel active ingredients and functional colorants.

Application

• Pharmaceutical Intermediate: A crucial building block for synthesizing novel drug candidates, particularly those with heterocyclic cores.
• Specialty Dye & Pigment Synthesis: Used in the production of high-value, functional dyes and pigments for textiles and advanced materials.
• Fine Chemical Synthesis: Serves as a versatile precursor in organic synthesis for creating complex sulfonated molecules.
• Biochemical Research: Employed in laboratory research as a reagent for studying enzyme inhibition and protein interactions.
• Material Science: Investigated for use in the development of organic semiconductors and conductive polymers.
• Analytical Chemistry: Can be used as a derivatization agent or a standard in chromatographic analysis.

Basic Information

Product Name	Isatin-5-Sulfonic Acid Sodium Salt
CAS No.	207399-16-4
Molecular Formula	C8H4NNaO5S
Molecular Weight	249.18 g/mol
Synonyms	5-Sulfoisatin Sodium Salt; Sodium 5-Sulfoisatin; Isatin-5-sulfonate Sodium Salt; 1H-Indole-2,3-dione, 5-sulfo-, sodium salt (1:1); 5-Sulfonatoisatin Sodium Salt; 2,3-Dioxoindoline-5-sulfonic Acid Sodium Salt; Sodium 2,3-Dihydro-2,3-dioxo-1H-indole-5-sulfonate
EINECS	Contact for details

Quality Control

Our Isatin-5-Sulfonic Acid Sodium Salt is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation (IR, NMR), to ensure it meets exacting standards for research and industrial use. Certificates of Analysis (COA) detailing all specifications are 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). This product is hygroscopic (moisture-sensitive); keep the original container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Water Content (KF)	≤ 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.