Description

4-Amino-6-[(4-aminophenyl)azo]-3-[[4'-[[5-[(4-aminophenyl)azo]-2,4-diaminophenyl]azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxynaphthalene-2,7-disulfonic acid disodium salt is a high-purity, complex azo dye intermediate essential for synthesizing high-performance colorants. This compound matters for its ability to impart deep, stable shades and is a critical building block in the production of specialized dyes and pigments. It is primarily needed by manufacturers in the textile, ink, and specialty polymer industries seeking to develop advanced coloring solutions with excellent fastness properties.

Application

• Primary Intermediate for Polyazo Dyes: Serves as a key precursor in the synthesis of high-grade direct dyes and acid dyes for textiles, particularly for cotton, silk, and nylon.
• Specialty Ink Manufacturing: Used in formulating high-performance inks for packaging, security printing, and digital textile printing that require specific color strength and stability.
• Functional Pigment Synthesis: A crucial component in creating complex organic pigments used in plastics, coatings, and automotive finishes.
• Research & Development: Employed in chemical R&D laboratories for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Analytical Chemistry: Can be utilized as a staining agent or a complexometric indicator in specific analytical methodologies.

Basic Information

Item	Detail
Product Name	4-Amino-6-[(4-aminophenyl)azo]-3-[[4'-[[5-[(4-aminophenyl)azo]-2,4-diaminophenyl]azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxynaphthalene-2,7-disulfonic acid disodium salt
CAS No.	6473-08-1
Molecular Formula	C40H30N12Na2O8S2
Molecular Weight	948.86 g/mol
Synonyms	Direct Black 22 (principal commercial name); C.I. 35435; Azo Black; 4-Amino-6-[(4-aminophenyl)azo]-3-[[4'-[[5-[(4-aminophenyl)azo]-2,4-diaminophenyl]azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid disodium salt; Pontamine Black E; Benzo Black; Diazol Black; Atul Direct Black
EINECS	Contact for details

Quality Control

Our production of 4-Amino-6-[(4-aminophenyl)azo]-3-[[4'-[[5-[(4-aminophenyl)azo]-2,4-diaminophenyl]azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxynaphthalene-2,7-disulfonic acid disodium salt adheres to stringent quality protocols to ensure batch-to-batch consistency and purity for industrial applications. Every lot undergoes rigorous analytical testing, including HPLC for purity and spectrophotometry for color strength verification. Certificates of Analysis (COA) detailing all specifications are provided with each 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture (KF)	≤ 5.0%
Water Solubility	Freely soluble
Ash Content	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm

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