Description

4-Amino-5-Hydroxy-3-[[4'-[[2-Hydroxy-4-[(2-Methylphenyl)Amino]Phenyl]Azo]-1,1'-Biphenyl-4-Yl]Azo]-6-Phenylazo-2,7-Naphthalenedisulfonic Acid is a high-purity, complex azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart specific, vibrant color properties and its role in synthesizing advanced colorants. It is primarily needed by manufacturers in the dye and pigment industry for producing specialized inks, textile dyes, and colorants for various substrates.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-performance, polyazo direct dyes and acid dyes.
• Textile Dyeing: Used in the production of dyes for coloring natural and synthetic fibers, particularly where deep, complex shades are required.
• Ink Manufacturing: Serves as a precursor for pigments used in printing inks, including those for packaging and specialty printing applications.
• Leather Coloring: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Dyeing: Used in the manufacture of dyes for coloring paper and paperboard products.
• Research & Development: A vital compound for R&D laboratories focusing on novel chromophore development and color chemistry.

Basic Information

Item	Details
Product Name	4-Amino-5-Hydroxy-3-[[4'-[[2-Hydroxy-4-[(2-Methylphenyl)Amino]Phenyl]Azo]-1,1'-Biphenyl-4-Yl]Azo]-6-Phenylazo-2,7-Naphthalenedisulfonic Acid
CAS No.	72379-45-4
Molecular Formula	C47H34N8O8S2
Molecular Weight	903.94 g/mol
Synonyms	Acid Black 210; C.I. 300310; Direct Black 166; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-((4'-((2-hydroxy-4-((2-methylphenyl)amino)phenyl)azo)(1,1'-biphenyl)-4-yl)azo)-6-(phenylazo)-; Black 210; C.I. Acid Black 210; Azo Black Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high purity. The manufacturing process is monitored against stringent in-house specifications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to guarantee compliance with your technical 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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF)	≤ 5.0%
Solubility	Soluble in alkaline water
Heavy Metals	≤ 20 ppm

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