Description

5-[[4'-[[8-[[7-[(2,4-Diaminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo]-1-hydroxy-3,6-bis(sodiosulfo)-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxybenzoic acid sodium salt is a high-purity, polyazo dye intermediate of significant commercial importance. Its complex molecular structure provides excellent chromophoric properties, making it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, colorfast products.

Application

• Primary Intermediate for Azo Dyes: A key building block for synthesizing complex, high-molecular-weight azo dyes, particularly for textile fibers like cotton, wool, and nylon.
• Pigment Manufacturing: Used in the production of organic pigments for inks, plastics, and industrial coatings, offering good lightfastness and thermal stability.
• Specialty Colorants: Serves as a precursor for specialty dyes used in leather finishing, paper coloring, and wood staining applications.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying structure-color relationships in dye chemistry.

Basic Information

Product Name	5-[[4'-[[8-[[7-[(2,4-Diaminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo]-1-hydroxy-3,6-bis(sodiosulfo)-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxybenzoic acid sodium salt
CAS No.	6428-43-9
Molecular Formula	C45H28N10Na4O16S4
Molecular Weight	~1229.0 g/mol (Contact for exact details)
Synonyms	Benzoic acid, 5-[[4'-[[8-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-1-hydroxy-3,6-disulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, sodium salt (1:4); Tetrasodium 5-({4'-[(E)-{8-[(E)-{7-[(E)-(2,4-diaminophenyl)diazenyl]-1-hydroxy-3-sulfonatonaphthalen-2-yl}diazenyl]-1-hydroxy-3,6-disulfonatonaphthalen-2-yl}diazenyl]-[1,1'-biphenyl]-4-yl}diazenyl)-2-hydroxybenzoate; Azo dye intermediate CAS 6428-43-9; Polyazo dye precursor.
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. Each lot is analyzed using advanced techniques like HPLC to confirm identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications 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 room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (Water)	Soluble

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