Description

Disodium 8-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]-5-[[4-[(Phenylsulphonyl)Oxy]Phenyl]Azo]Naphthalene-2-Sulphonate is a high-purity, synthetic azo dye intermediate of significant industrial importance. This compound is valued for its precise chemical structure, which imparts specific chromophoric properties essential for producing vivid and stable colorants. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries for the synthesis of high-performance dyes and pigments.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-value, complex azo dyes for textiles and fibers.
• Inkjet and Printing Inks: Used in the manufacture of colorants for high-resolution digital and industrial printing applications.
• Specialty Coatings and Paints: Imparts color and stability in coatings for plastics, automotive finishes, and industrial paints.
• Paper Coloring: Employed in the production of dyes for high-quality, colored paper and packaging materials.
• Research & Development: Serves as a critical reagent in chemical R&D for developing new chromophores and functional dyes.
• Functional Dyes: Potential use in the synthesis of dyes for non-textile applications, such as in optical data storage or liquid crystal displays (LCDs).

Basic Information

Product Name	Disodium 8-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]-5-[[4-[(Phenylsulphonyl)Oxy]Phenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	72986-61-9
Molecular Formula	C40H24N6Na2O13S3
Molecular Weight	962.81 g/mol
Synonyms	Disodium 8-[[4-[(4-nitro-2-sulfonatophenyl)amino]phenyl]azo]-5-[[4-[(phenylsulfonyl)oxy]phenyl]azo]naphthalene-2-sulfonate; CI 29050; Azo dye intermediate 72986-61-9; 8-[[4-[(4-Nitro-2-sulfophenyl)amino]phenyl]azo]-5-[[4-[(phenylsulfonyl)oxy]phenyl]azo]-2-naphthalenesulfonic acid disodium salt; Disulfonated azo dye intermediate; Reactive dye precursor
EINECS	Contact for details

Quality Control

Our Disodium 8-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]-5-[[4-[(Phenylsulphonyl)Oxy]Phenyl]Azo]Naphthalene-2-Sulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, chemical identity, and performance. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and physical characteristics are provided and available upon request to support your quality assurance protocols.

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); therefore, the container must be kept tightly sealed when not in use to prevent degradation due to moisture absorption.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in water)	Partially soluble

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