Description

5-[[4'-[[8-[[2,4-Diamino-5-[(4-sodiosulfophenyl)azo]phenyl]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, water-soluble azo dye intermediate of significant commercial importance. Its complex, multi-azo structure provides exceptional color strength and binding properties, making it a critical component for producing vibrant and durable dyes. This compound is primarily sought after by manufacturers in the textile, leather, and specialty ink industries who require consistent quality and reliable supply for their high-performance colorant formulations.

Application

• Primary Dye Synthesis: A key intermediate for the production of high-grade, polyazo direct dyes and reactive dyes, particularly for cellulose fibers like cotton and viscose.
• Textile Coloration: Used in formulations for dyeing and printing textiles, offering excellent wash and light fastness properties in the final product.
• Leather Finishing: Employed in the dyeing process for leather goods, providing deep, uniform shades with good penetration.
• Paper and Specialty Inks: Utilized in the manufacture of colored papers and certain types of inks where water solubility and color intensity are required.
• Research & Development: Serves as a precise chemical building block in R&D laboratories for developing novel chromophores and studying azo dye chemistry.
• Biological Staining: Potential application as a histological stain precursor due to its affinity for specific biological tissues, subject to further purification and testing.

Basic Information

Product Name	5-[[4'-[[8-[[2,4-Diamino-5-[(4-sodiosulfophenyl)azo]phenyl]azo]-1-hydroxy-3,6-bis(sodiosulfo)-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxybenzoic acid sodium salt
CAS No.	83606-72-8
Molecular Formula	C45H28N10Na4O14S4
Molecular Weight	1192.98 g/mol (approx.)
Synonyms	Direct Black 22 (Parent Dye); Sodium 5-({4'-[(8-{[2,4-diamino-5-(4-sulfonatophenyl)diazenyl]phenyl}diazenyl)-1-hydroxy-3,6-disulfonato-2-naphthyl]diazenyl}[1,1'-biphenyl]-4-yl)diazenyl-2-hydroxybenzoate; C.I. 35435; Polyazo dye intermediate; Tetrasodium salt; Azo dye precursor; Water-soluble azo compound; 5-[(4'-{[8-({2,4-Diamino-5-[(4-sulfophenyl)azo]phenyl}azo)-1-hydroxy-3,6-disulfo-2-naphthyl]azo}[1,1'-biphenyl]-4-yl)azo]-2-hydroxybenzoic acid sodium salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity. Quality is verified through multiple analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each 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 (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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