Description

Disodium 4-[[5-[(3-Amino-4-Nitrophenyl)Azo]-2,4-Dihydroxyphenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a critical precursor for synthesizing specific, high-performance dyes and pigments, particularly in applications demanding color fastness and chemical stability. This compound is essential for manufacturers in the textile, leather, and specialty ink industries seeking to produce vibrant and durable colorants.

Application

• Primary Intermediate for Dye Synthesis: A key building block in the production of acid dyes and direct dyes, especially for polyamide fibers like wool and nylon.
• Textile Dyeing: Used to formulate dyes that provide excellent wash and light fastness on silk, wool, and synthetic fabrics.
• Leather Coloring: Employed in the manufacture of dyes for high-quality leather finishing, offering deep, uniform shades.
• Paper and Specialty Ink Production: Serves as a colorant component in high-grade paper dyes and certain types of inks.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying azo dye chemistry and properties.
• Biological Staining: Potential application as a staining agent in histological and microbiological research due to its specific chromogenic structure.

Basic Information

Item	Details
Product Name	Disodium 4-[[5-[(3-Amino-4-Nitrophenyl)Azo]-2,4-Dihydroxyphenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	72828-77-4
Molecular Formula	C22H14N6Na2O11S2
Molecular Weight	648.48 g/mol
Synonyms	Acid Black 210; C.I. 28440; Disodium 5-hydroxy-6-[(2-hydroxy-5-[(2-methyl-4-nitrophenyl)azo]phenyl)azo]naphthalene-1,7-disulfonate; 1,7-Naphthalenedisulfonic acid, 5-hydroxy-6-((2-hydroxy-5-((2-methyl-4-nitrophenyl)azo)phenyl)azo)-, disodium salt; Azo dye intermediate 72828-77-4; 4-[[5-[(3-Amino-4-nitrophenyl)azo]-2,4-dihydroxyphenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 4-[[5-[(3-Amino-4-Nitrophenyl)Azo]-2,4-Dihydroxyphenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, impurity profile, and physical specifications. Our quality commitment ensures the material meets the high standards required for industrial dye synthesis.

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). This compound is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept sealed when not in use to prevent absorption of moisture and degradation. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Moisture Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Solubility (in Water)	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.