Description

3-[[2,5-Dichloro-4-[(Ethylamino)Sulfonyl]Phenyl]Azo]-2-Methyl-1H-Indole-7-Sulfonic Acid Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart vivid and stable coloration, making it a critical component in the synthesis of specialized dyes and pigments. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Textile Dye Synthesis: A key intermediate for manufacturing reactive and direct dyes for cotton, wool, and synthetic fibers.
• Inkjet and Printing Inks: Used in the production of high-quality pigments for industrial and digital printing applications.
• Specialty Pigments: Serves as a precursor for creating pigments used in plastics, coatings, and masterbatches.
• Research & Development: Employed in chemical research for developing novel chromophores and functional dyes.
• Analytical Reagents: Can be utilized as a staining agent or indicator in specific laboratory and diagnostic applications.
• Functional Material Synthesis: Potential use in the development of dyes for optical sensors or light-harvesting materials.

Basic Information

Product Name	3-[[2,5-Dichloro-4-[(Ethylamino)Sulfonyl]Phenyl]Azo]-2-Methyl-1H-Indole-7-Sulfonic Acid Sodium Salt
CAS No.	67786-20-3
Molecular Formula	C18H15Cl2N4O5S2Na
Molecular Weight	541.36 g/mol
Synonyms	Sodium 3-((2,5-dichloro-4-(N-ethylsulfamoyl)phenyl)azo)-2-methyl-1H-indole-7-sulfonate; C.I. Reactive Red 238; 7-Sulfo-3-[[2,5-dichloro-4-[(ethylamino)sulfonyl]phenyl]azo]-2-methylindole Sodium Salt; 3-[(2,5-Dichloro-4-[(ethylamino)sulfonyl]phenyl)azo]-2-methyl-1H-indole-7-sulfonic acid sodium salt; Reactive Red 238; Acid Red 238 (related class); Dye Intermediate 67786-20-3
EINECS	Contact for details

Quality Control

Our production of 3-[[2,5-Dichloro-4-[(Ethylamino)Sulfonyl]Phenyl]Azo]-2-Methyl-1H-Indole-7-Sulfonic Acid Sodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) detailing all critical parameters are provided with each 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); the container must be kept tightly sealed to prevent absorption of atmospheric 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.