Description

Sodium 3-[[2,5-Dichloro-4-[(Ethylamino)Sulphonyl]Phenyl]Azo]-2-Methyl-1H-Indolesulphonate is a high-purity synthetic organic compound belonging to the azo dye chemical class. This product is valued for its consistent quality and reliable performance as a specialized colorant and intermediate in advanced manufacturing processes. It is primarily required by industries involved in the production of high-performance pigments, specialty inks, and functional materials where precise color properties and chemical stability are critical.

Application

• Specialty Pigment Manufacturing: Serves as a key intermediate for producing high-performance, light-stable azo pigments.
• Functional Dyes for Polymers: Used in the coloration of engineering plastics and synthetic fibers requiring specific thermal and chemical resistance.
• Advanced Ink Formulations: A critical component in specialty printing inks, including security inks and inks for non-porous substrates.
• Research & Development: Employed as a standard or building block in chemical research for developing new chromophores and functional materials.
• Liquid Crystal Display (LCD) Color Filters: Potential application in the formulation of colorants for electronic display technologies.
• Analytical Chemistry: Can be used as a reagent or standard in chromatographic analysis and method development.

Basic Information

Product Name	Sodium 3-[[2,5-Dichloro-4-[(Ethylamino)Sulphonyl]Phenyl]Azo]-2-Methyl-1H-Indolesulphonate
CAS No.	83232-43-3
Molecular Formula	C17H14Cl2N4NaO5S2
Molecular Weight	527.34 g/mol
Synonyms	Sodium 2-Methyl-3-[[2,5-dichloro-4-[(ethylamino)sulfonyl]phenyl]azo]-1H-indole-5-sulfonate; C.I. Pigment Red 279; 3-[[2,5-Dichloro-4-[(ethylamino)sulfonyl]phenyl]azo]-2-methyl-1H-indole-5-sulfonic Acid Sodium Salt; 1H-Indole-5-sulfonic acid, 3-[[2,5-dichloro-4-[(ethylamino)sulfonyl]phenyl]azo]-2-methyl-, sodium salt; Azo dye intermediate 83232-43-3; Sodium salt of a dichloro-ethylaminosulfonyl azo indole sulfonic acid
EINECS	Contact for details

Quality Control

Our production of Sodium 3-[[2,5-Dichloro-4-[(Ethylamino)Sulphonyl]Phenyl]Azo]-2-Methyl-1H-Indolesulphonate adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure compliance with agreed specifications and consistent batch-to-batch performance. Comprehensive Certificates of Analysis (COA) documenting all critical parameters are provided to guarantee traceability and quality assurance for our global B2B clients.

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). Keep the container tightly sealed to protect from moisture. Store away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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