Description

2,2'-(1,2-Ethenediyl)Bis[5-[[2-Methoxy-4-[(3-Sulfophenyl)Azo]Phenyl]-Nno-Azoxy]Benzenesulfonic Acid]Tetrasodium Salt is a high-purity, water-soluble anionic azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple sulfonate groups, provides excellent solubility and binding properties, making it a critical precursor for specialized colorants. This compound is essential for manufacturers in the textile, ink, and specialty polymer industries seeking to produce vivid, stable, and functional dyes and pigments.

Application

• Textile Dyeing: As a key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon, providing enhanced color fastness and brightness.
• Inkjet Inks: Used in the production of high-performance colorants for industrial and graphic arts inks, ensuring superior print quality and stability.
• Functional Polymer Synthesis: Acts as a monomer or additive to introduce chromophoric and anionic properties into specialty polymers and coatings.
• Paper Coloring: Employed in the manufacture of dyes for high-grade paper and packaging materials.
• Biological Staining: Potential use as a precursor for histological stains and diagnostic reagents in life sciences.
• Liquid Crystal Displays (LCDs): Serves as an intermediate for color filters and alignment layers in display technologies.

Basic Information

Product Name	2,2'-(1,2-Ethenediyl)Bis[5-[[2-Methoxy-4-[(3-Sulfophenyl)Azo]Phenyl]-Nno-Azoxy]Benzenesulfonic Acid]Tetrasodium Salt
CAS No.	70815-27-9
Molecular Formula	C44H30N8Na4O20S4
Molecular Weight	~1198.0 g/mol (Contact for exact details)
Synonyms	Reactive Black 5 Intermediate; Tetrasodium 2,2'-(ethene-1,2-diyl)bis(5-((2-methoxy-4-((3-sulfophenyl)diazenyl)phenyl)diazenyl)benzenesulfonate); Azo Dye Intermediate 70815-27-9; C.I. Reactive Black 5 Precursor; 1,2-Bis(5-((2-methoxy-4-((3-sulfophenyl)diazenyl)phenyl)diazenyl)-2-sulfonatophenyl)ethene Tetrasodium Salt; Bis-Azo Dye Tetrasodium Salt; Light-sensitive azo dye intermediate.
EINECS	Contact for details

Quality Control

Our production of 2,2'-(1,2-Ethenediyl)Bis[5-[[2-Methoxy-4-[(3-Sulfophenyl)Azo]Phenyl]-Nno-Azoxy]Benzenesulfonic Acid]Tetrasodium Salt adheres to a stringent quality management system to ensure batch-to-batch consistency and purity for industrial applications. All materials are subjected to comprehensive analytical testing, including HPLC for assay and impurity profiling. Certificates of Analysis (COA) detailing purity, identity, and specific parameters are provided with every shipment 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 compound is light-sensitive (store away from light) and hygroscopic (moisture-sensitive). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content (KF)	Max. 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Individual impurity: Max. 1.0% Total impurities: Max. 5.0%

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