Description

2-Hydroxy-5-[[4'-[[1-hydroxy-7-[(1,8-dihydroxy-4-sodiosulfo-2-naphthalenyl)azo]-3-sodiosulfo-2-naphthalenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]benzoic acid sodium salt is a high-purity, complex azo dye intermediate essential for producing vivid and stable colorants. This compound matters for manufacturers requiring precise chromophore structures to achieve specific shades and performance characteristics in demanding applications. It is primarily needed by industrial-scale producers of dyes and pigments for textiles, inks, and specialty coatings who prioritize batch-to-batch consistency and supply chain reliability.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical building block in the synthesis of high-performance, polyazo direct and reactive dyes.
• Textile Dyeing: Used in the production of dyes for coloring cotton, viscose, and other cellulosic fibers, offering good wash and light fastness.
• Ink Manufacturing: A key component for formulating specialty printing inks, including those for packaging and security applications.
• Industrial Pigments: Employed in the creation of pigments for plastics, paints, and coatings where color strength and stability are paramount.
• Research & Development: Utilized in chemical R&D for developing new chromophores and studying structure-color relationships.
• Specialty Colorants: Potential use in the synthesis of colorants for leather, paper, and other niche industrial materials.

Basic Information

Product Name	2-Hydroxy-5-[[4'-[[1-hydroxy-7-[(1,8-dihydroxy-4-sodiosulfo-2-naphthalenyl)azo]-3-sodiosulfo-2-naphthalenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]benzoic acid sodium salt
CAS No.	6360-46-9
Molecular Formula	C47H30N6Na3O14S3
Molecular Weight	1084.0 g/mol (approx.)
Synonyms	Benzoic acid, 2-hydroxy-5-[[4'-[[1-hydroxy-7-[(1,8-dihydroxy-4-sulfo-2-naphthalenyl)azo]-3-sulfo-2-naphthalenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-, trisodium salt; C.I. Direct Brown 1:1; Direct Brown 1:1; Direct Brown 1:1 (trisodium salt); Trisodium 5-[[4'-[[7-[(1,8-dihydroxy-4-sulphonato-2-naphthyl)azo]-1-hydroxy-3-sulphonato-2-naphthyl]azo]-3,3'-dimethylbiphenyl-4-yl]azo]-2-hydroxybenzoate
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to stringent quality control protocols to ensure chemical purity, structural integrity, and batch-to-batch reproducibility suitable for industrial synthesis. Every lot is analyzed against established specifications, including identity confirmation by spectroscopic methods and purity assessment by HPLC. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 quality and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (Water)	Partially soluble to soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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