Description

Sodium 2-[[[2,5-Dichloro-4-[(2-Methyl-1H-Indol-3-Yl)Azo]Phenyl]Sulphonyl]Amino]Ethanesulphonate is a high-purity, water-soluble anionic azo dye intermediate, valued for its precise chemical structure and consistent performance in demanding synthesis processes. Its primary commercial importance lies in its role as a key precursor for manufacturing specialized dyes and pigments, particularly those requiring high color strength and stability. This compound is essential for industrial manufacturers and R&D laboratories focused on producing advanced colorants for textiles, inks, and functional materials.

Application

• Primary Intermediate for Reactive Dyes: Synthesis of high-performance reactive dyes for cotton and cellulose fiber dyeing.
• Specialty Pigment Manufacturing: Production of high-strength, lightfast azo pigments for inks and coatings.
• Functional Dye Synthesis: Key building block for dyes used in non-textile applications, such as sensitizers or indicators.
• Research & Development: Used in chemical research for developing novel chromophores with specific optical properties.
• Fine Chemical Production: Intermediate in the multi-step synthesis of complex organic molecules for the chemical industry.

Basic Information

Item	Details
Product Name	Sodium 2-[[[2,5-Dichloro-4-[(2-Methyl-1H-Indol-3-Yl)Azo]Phenyl]Sulphonyl]Amino]Ethanesulphonate
CAS No.	68959-19-3
Molecular Formula	C17H13Cl2N4NaO5S2
Molecular Weight	517.33 g/mol
Synonyms	2,5-Dichloro-4-[(2-methyl-1H-indol-3-yl)azo]benzenesulfonamide, N-(2-sulfoethyl)-, sodium salt; Sodium 2-({[2,5-dichloro-4-[(2-methyl-1H-indol-3-yl)diazenyl]phenyl]sulfonyl}amino)ethane-1-sulfonate; C.I. Reactive Red 238 (related); Azo dye intermediate 68959-19-3; Sodium salt of sulfonated azo indole derivative
EINECS	Contact for details

Quality Control

Our production of Sodium 2-[[[2,5-Dichloro-4-[(2-Methyl-1H-Indol-3-Yl)Azo]Phenyl]Sulphonyl]Amino]Ethanesulphonate adheres to a strict quality management system to ensure batch-to-batch consistency and reliability for industrial synthesis. Every lot undergoes rigorous analytical testing, including HPLC for purity and identity confirmation. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The container must be kept tightly closed to protect from moisture.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Clear solution

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