Description

3-[(2-Chloro-4-Nitrophenyl)Azo]-5-[[2,4-Dihydroxy-5-[[4-[(4-Nitro-2-Sulfophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-4-Hydroxy-2,7-Naphthalenedisulfonic Acid is a high-purity, complex azo dye intermediate of significant commercial importance. Its value lies in its precise molecular structure, which serves as a critical building block for synthesizing specialized dyes and pigments with enhanced color fastness and specific optical properties. This compound is essential for manufacturers and R&D laboratories in the colorant industry seeking to develop advanced products for demanding applications.

Application

This specialized azo compound is a key intermediate for the synthesis of high-performance dyes and pigments. Its primary and related applications include:

• Precursor for Reactive Dyes: Used in the manufacture of reactive dyes for textile coloring, particularly for cotton and other cellulose fibers, where strong covalent bonds are required.
• Synthesis of Acid Dyes: Serves as an intermediate for producing acid dyes used on protein fibers like wool, silk, and nylon.
• Specialty Pigment Manufacturing: A building block for creating complex organic pigments with specific shades and improved durability for inks, coatings, and plastics.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Functional Dye Production: Potential use in synthesizing dyes for non-textile applications, such as in laser dyes, optical data storage, or sensitizers.

Basic Information

Item	Detail
Product Name	3-[(2-Chloro-4-Nitrophenyl)Azo]-5-[[2,4-Dihydroxy-5-[[4-[(4-Nitro-2-Sulfophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-4-Hydroxy-2,7-Naphthalenedisulfonic Acid
CAS No.	72139-01-6
Molecular Formula	C34H20ClN9O16S3
Molecular Weight	950.21 g/mol
Synonyms	Acid Black 210; C.I. 300310; 3-[(2-Chloro-4-nitrophenyl)azo]-5-[[2,4-dihydroxy-5-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]phenyl]azo]-4-hydroxy-2,7-naphthalenedisulfonic acid; 2,7-Naphthalenedisulfonic acid, 3-[(2-chloro-4-nitrophenyl)azo]-5-[[2,4-dihydroxy-5-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]phenyl]azo]-4-hydroxy-; Reactive Black 5 related intermediate; Azo dye intermediate CAS 72139-01-6
EINECS	Contact for details

Quality Control

Our production of 3-[(2-Chloro-4-Nitrophenyl)Azo]-5-[[2,4-Dihydroxy-5-[[4-[(4-Nitro-2-Sulfophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-4-Hydroxy-2,7-Naphthalenedisulfonic Acid adheres to a rigorous quality management system. Each batch is analyzed using advanced techniques like HPLC to ensure high purity and consistent chemical structure. Comprehensive Certificates of Analysis (COA) detailing identity, assay, and impurity profiles are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. Due to the complex azo and sulfonic acid structure, the material should be considered moisture-sensitive; ensure the container is sealed after each use to prevent absorption of atmospheric moisture.

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	Max. 1.0%
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Individual impurity: Max. 1.0% Total impurities: Max. 5.0%

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