Description

2,3-Dioxoindoline-5-Sulphonic Acid is a specialized organic sulfonic acid derivative of isatin, serving as a key synthetic intermediate and functional building block. Its value lies in the reactive oxo and sulfonic acid groups, which enable its use in the synthesis of complex molecules, particularly in the development of active pharmaceutical ingredients (APIs) and high-performance dyes. This compound is essential for R&D chemists and production units in the pharmaceutical, agrochemical, and fine chemical industries seeking to introduce specific functional groups into their target molecules.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of various drug candidates, particularly those with indole-based structures.
• Agrochemical Synthesis: Used in the development of novel herbicides, fungicides, and plant growth regulators.
• Dye and Pigment Manufacturing: Acts as a key component in the production of specialized dyes and colorants.
• Chemical Research & Development: Employed as a versatile building block for creating complex organic molecules in academic and industrial labs.
• Ligand and Chelating Agent Precursor: Useful in the synthesis of ligands for metal catalysis and coordination chemistry.
• Bioconjugation and Probe Development: Its functional groups allow for conjugation in biochemical applications.

Basic Information

Product Name	2,3-Dioxoindoline-5-Sulphonic Acid
CAS No.	7313-70-4
Molecular Formula	C8H5NO5S
Molecular Weight	227.19 g/mol
Synonyms	5-Sulfoisatin; Isatin-5-sulfonic Acid; 2,3-Dihydro-2,3-dioxo-1H-indole-5-sulfonic Acid; 1H-Indole-5-sulfonic acid, 2,3-dihydro-2,3-dioxo-; 5-Sulphoisatin; 2,3-Indolinedione-5-sulfonic acid; 5-Sulfoisatin; 2,3-Dioxoindoline-5-sulfonic Acid
EINECS	Contact for details

Quality Control

Our 2,3-Dioxoindoline-5-Sulphonic Acid is manufactured under strict quality protocols to ensure batch-to-batch consistency and high purity. We employ advanced analytical techniques, including HPLC and NMR, to verify identity and quantify impurities. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and specific tests is provided with each shipment to support your quality assurance processes.

Storage

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

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 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.