Description

5-[[4'-[[8-Amino-1-Hydroxy-7-[(4-Sodiosulfophenyl)Azo]-5-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 industrial importance. Its complex poly-azo structure, featuring multiple sulfonate groups, makes it a critical precursor for synthesizing high-value, colorfast dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, durable colors with excellent substrate affinity.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-performance reactive dyes used in cotton and cellulose fiber dyeing and printing.
• Production of Acid Dyes: Used in the manufacture of acid dyes for coloring wool, silk, and nylon, providing good leveling and wet-fastness properties.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments used in high-quality inks, paints, and plastics.
• Functional Dye Manufacturing: Utilized in the production of dyes for specialized applications, including leather finishing and paper coloring.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying azo dye chemistry and properties.

Basic Information

Product Name	5-[[4'-[[8-Amino-1-Hydroxy-7-[(4-Sodiosulfophenyl)Azo]-5-Sodiosulfo-2-Naphthalenyl]Azo]-1,1'-Biphenyl-4-Yl]Azo]-2-Hydroxybenzoic Acid Sodium Salt
CAS No.	6757-08-0
Molecular Formula	C41H26N7Na3O12S3
Molecular Weight	1001.82 g/mol
Synonyms	Benzoic acid, 5-[[4'-[[8-amino-1-hydroxy-7-[(4-sulfophenyl)azo]-5-sulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, trisodium salt; C.I. 27290; Trisodium 5-({4'-[(8-amino-1-hydroxy-7-{4-sulfonatophenyl)diazenyl}-5-sulfonato-2-naphthyl)diazenyl}[1,1'-biphenyl]-4-yl)diazenyl)-2-hydroxybenzoate; Reactive Dye Intermediate 27290; Acid Black Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems, ensuring batch-to-batch consistency and purity for downstream synthesis. Quality is verified through comprehensive analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming key parameters such as assay purity, impurity profile, and heavy metal content to meet your specific application requirements.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%

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