Description

6'-Amino-1'-Hydroxy-4-[[4-[(3-Sodiosulfophenyl)Azo]-1-Naphthalenyl]Azo][1,2'-Azobisnaphthalene]-3',7-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure is engineered to deliver exceptional color strength and stability, making it a critical precursor for high-performance dyes. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors seeking to produce vivid, durable colors.

Application

• Primary Intermediate for Polyazo Dyes: Serves as a key building block in the synthesis of deep, complex shades of black, navy blue, and brown dyes for textiles and leather.
• Textile Dyeing and Printing: Used in the production of dyes for cotton, wool, silk, and nylon, offering good wash and light fastness.
• Ink Manufacturing: A vital component in formulating high-quality pigments for inks used in packaging, publications, and specialty printing.
• Paper Coloring: Employed in the manufacture of dyes for coloring paper and paper products.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo dye chemistry and properties.
• Specialty Chemical Synthesis: Acts as an intermediate for creating functional chemicals where the azo group or specific aromatic structure is required.

Basic Information

Item	Detail
Product Name	6'-Amino-1'-Hydroxy-4-[[4-[(3-Sodiosulfophenyl)Azo]-1-Naphthalenyl]Azo][1,2'-Azobisnaphthalene]-3',7-Disulfonic Acid Disodium Salt
CAS No.	6416-70-2
Molecular Formula	C32H19N7Na2O10S3
Molecular Weight	819.70 g/mol
Synonyms	Direct Black 19 (Intermediate); C.I. 35255; 1,2'-Azobisnaphthalene-3',7-disulfonic acid, 6'-amino-1'-hydroxy-4-[[4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]-, disodium salt; 6'-Amino-1'-hydroxy-4-[[4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]-1,2'-azobisnaphthalene-3',7-disulfonic acid disodium salt; Polyazo dye intermediate; Azo dye precursor
EINECS	Contact for details

Quality Control

Our 6'-Amino-1'-Hydroxy-4-[[4-[(3-Sodiosulfophenyl)Azo]-1-Naphthalenyl]Azo][1,2'-Azobisnaphthalene]-3',7-Disulfonic Acid Disodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color value, and performance. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and solubility are provided 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 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 quality and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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