Description

4-Amino-3-[(4-Aminophenyl)Azo]-6-[[4-[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Amino]-3-Sulfophenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid is a high-purity, polyazo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulfonic acid groups, makes it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce deep, vibrant, and colorfast shades.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for cotton and other cellulosic fibers, providing excellent wash and light fastness.
• Production of Direct Dyes: Used in the manufacture of direct dyes for paper, leather, and textile applications requiring strong affinity and deep coloration.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments used in high-quality inks, paints, and plastics.
• Functional Dye Manufacturing: Employed in the production of dyes for non-textile applications, including sensitizers and functional colorants for advanced materials.
• Research & Development: Used in chemical R&D laboratories for developing novel chromophores and studying azo dye chemistry and properties.

Basic Information

Product Name	4-Amino-3-[(4-Aminophenyl)Azo]-6-[[4-[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Amino]-3-Sulfophenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid
CAS No.	72939-52-7
Molecular Formula	C34H26N10O11S3
Molecular Weight	854.82 g/mol
Synonyms	Acid Black 234; C.I. 30027; 2,7-Naphthalenedisulfonic acid, 4-amino-3-[(4-aminophenyl)azo]-6-[[4-[[4-[(2,4-diaminophenyl)azo]phenyl]amino]-3-sulfophenyl]azo]-5-hydroxy-; Polyazo dye intermediate; Reactive Black 5 precursor; Tetrakisazo dye intermediate
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. Each lot is analyzed using modern analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment, supporting your own quality assurance and regulatory compliance needs.

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 or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in Water)	Partially soluble
Heavy Metals (as Pb)	≤ 20 ppm

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