Description

Tetrasodium 3,3'-[Azoxybis[[3-(2-Hydroxyethoxy)-4,1-Phenylene]Azo]]Bis[4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate] is a high-purity, complex anionic dye intermediate characterized by its multiple sulphonate groups, which confer excellent water solubility and substantivity. This compound is a critical precursor for synthesizing specialized dyes and colorants, offering superior color strength and stability in demanding formulations. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking advanced chromophores for high-performance applications.

Application

• Primary Intermediate for Reactive and Direct Dyes: A key building block in the synthesis of high-quality dyes for cotton, wool, and nylon fibers.
• Specialty Ink Manufacturing: Used in the production of inks for jet printing, security printing, and other high-value applications requiring precise color properties.
• Functional Colorant for Coatings: Imparts color and functional properties to industrial and automotive coatings where lightfastness and chemical resistance are critical.
• Research & Development: Serves as a valuable chemical entity in R&D labs for developing novel chromophores and studying azo dye chemistry.
• Paper Coloring: Potential use in the manufacture of specialty colored papers and boards.
• Biological Staining Agent Precursor: Can be used in the synthesis of stains for microscopic analysis in biological and histological studies.

Basic Information

Product Name	Tetrasodium 3,3'-[Azoxybis[[3-(2-Hydroxyethoxy)-4,1-Phenylene]Azo]]Bis[4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate]
CAS No.	93894-75-8
Molecular Formula	C58H48N8Na4O24S6
Molecular Weight	~1473.3 g/mol (Contact for exact details)
Synonyms	Acid Black 210 (C.I. 300317); Tetrasodium 6,6'-[Azoxybis(2-[(4-hydroxy-6-[(4-methylphenyl)sulfonyl]amino]-1-naphthyl]azo]-5-hydroxy-m-phenylene)bis(oxy)]di-2-ethanesulfonate; Reactive Black 5 related intermediate; Azo dye intermediate, sulfonated; 93894-75-8; Light-sensitive azo dye salt; Poly-sulphonated naphthalene derivative
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Quality is verified through comprehensive analytical testing including HPLC, UV-Vis spectroscopy, and titration methods. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content (KF)	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Freely soluble

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