Description

5-Amino-3-[[4-[[4-[(6-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo]Phenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid is a high-purity, polyazo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulphonic acid 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 chemical industries who require precise and reliable intermediates for producing vibrant and stable colors. The CAS number for this product is 74499-66-4.

Application

This advanced dye intermediate serves as a key building block in several high-performance colorant applications. Its primary and derived uses include:

• Textile Dye Synthesis: As a core intermediate for producing high-grade, wash-fast azo dyes for cotton, wool, and synthetic fibers.
• Inkjet and Printing Ink Pigments: Used in the manufacture of pigments for inks requiring excellent color strength and stability.
• Leather Dyeing: Employed in the synthesis of dyes for the leather industry, providing deep, penetrating colors.
• Paper Coloring: Serves as a precursor for dyes used in specialty paper products.
• Research & Development: Utilized in chemical research for developing novel chromophores and functional dyes.
• Liquid Crystal Dyes (LCD): Potential application in the synthesis of dyes for display technologies due to its complex aromatic structure.

Basic Information

Item	Detail
Product Name	5-Amino-3-[[4-[[4-[(6-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo]Phenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid
CAS No.	74499-66-4
Molecular Formula	C38H26N10O13S3
Molecular Weight	950.85 g/mol
Synonyms	5-Amino-4-hydroxy-3-{[4-({4-[(6-amino-1-hydroxy-3-sulfo-2-naphthyl)diazenyl]phenyl}diazenyl)phenyl]diazenyl}naphthalene-2,7-disulfonic acid; Trisazo dye intermediate; C.I. Direct Brown 209 intermediate; Polyazo dye precursor; 74499-66-4; 5-Amino-3-((4-((4-((6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)phenyl)azo)phenyl)azo)-4-hydroxy-2,7-naphthalenedisulfonic acid
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including HPLC and spectrophotometry to verify identity and assay. A Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment. We support compliance with global chemical management regulations such as REACH.

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 tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Ash Content	≤ 1.0%
Water Solubility	Freely 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.