Description

4-Amino-6-[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Azo]-3-[[4-[(2,4-Diamino-5-Sulfophenyl)Azo]Phenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Trisodium Salt is a high-purity, multi-functional azo dye intermediate. This compound is valued for its ability to impart deep, complex color shades and its reactivity as a key building block in advanced dye synthesis. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance dyes and pigments.

Application

• Primary Intermediate for Polyazo Dyes: Serves as a critical precursor in the synthesis of deep black, navy blue, and other complex polyazo direct dyes for cotton and cellulose fibers.
• Textile Dyeing and Printing: Used in formulations for textile dyeing and printing processes, offering good wash and light fastness properties.
• Inkjet and Specialty Inks: Employed in the production of high-quality inks for digital printing and packaging, where color strength and stability are paramount.
• Leather and Paper Dyeing: Applicable in dyeing leather and paper products, providing vibrant and durable coloration.
• Research & Development: Utilized in chemical R&D for developing new chromophores and studying azo dye chemistry and properties.

Basic Information

Product Name	4-Amino-6-[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Azo]-3-[[4-[(2,4-Diamino-5-Sulfophenyl)Azo]Phenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Trisodium Salt
CAS No.	73157-44-5
Molecular Formula	C40H28N12O13S3Na3
Molecular Weight	1086.9 g/mol (approx.)
Synonyms	Direct Black 22 (Intermediate); Trisodium 4-amino-6-{[4-[(2,4-diaminophenyl)diazenyl]phenyl]diazenyl}-3-{[4-[(2,4-diamino-5-sulfophenyl)diazenyl]phenyl]diazenyl}-5-hydroxynaphthalene-2,7-disulfonate; C.I. 35435; Polyazo Dye Intermediate; Azo Dye Precursor; 2,7-Naphthalenedisulfonic acid derivative; Tetrakisazo dye intermediate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing including HPLC for purity, spectrophotometry for color value, and wet chemical analysis to ensure consistency and performance. Certificates of Analysis (COA) detailing batch-specific results are provided to guarantee compliance with your technical specifications.

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 quality and handling.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 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.