Description

4-Amino-3,6-Bis[(4-Amino-2-Sulphophenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid is a high-purity, complex azo dye intermediate of significant commercial importance. Its value lies in its role as a critical precursor for synthesizing high-performance dyes and pigments, particularly those requiring specific color properties and stability. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant and durable colorants.

Application

• Primary Intermediate for Dyes & Pigments: Serves as a key building block in the synthesis of high-value, complex azo dyes, especially for textile applications.
• Textile Dye Manufacturing: Used in the production of dyes for coloring natural and synthetic fibers, offering potential for deep, stable shades.
• Inkjet and Printing Ink Formulation: A valuable precursor for creating specialized pigments used in high-quality inks, contributing to color intensity and lightfastness.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Specialty Chemical Synthesis: Acts as an intermediate for other functional chemicals where its specific aromatic and azo structure is required.

Basic Information

Product Name	4-Amino-3,6-Bis[(4-Amino-2-Sulphophenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid
CAS No.	66620-37-9
Molecular Formula	C28H22N8O11S4
Molecular Weight	782.78 g/mol
Synonyms	Acid Black 210 Intermediate; C.I. 300310; 4-Amino-3,6-bis[(4-amino-2-sulfophenyl)azo]-5-hydroxy-2,7-naphthalenedisulfonic acid; 5-Hydroxy-4-amino-3,6-bis[(4-amino-2-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid; 2,7-Naphthalenedisulfonic acid, 4-amino-3,6-bis[(4-amino-2-sulfophenyl)azo]-5-hydroxy-; 66620-37-9; AB 210 Intermediate
EINECS	Contact for details

Quality Control

Our production of 4-Amino-3,6-Bis[(4-Amino-2-Sulphophenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. All materials undergo rigorous analytical testing, including HPLC for assay and impurity profiling. Certificates of Analysis (COA) detailing purity, identity, and other critical parameters are available upon request to support your quality assurance processes.

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. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark colored powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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