Description

Disodium 4-Amino-3,6-Bis[[4-[(2,4-Dihydroxyphenyl)Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, complex azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart strong, vibrant colors and its role in synthesizing specialized dyes and pigments. It is primarily needed by manufacturers in the textile, ink, and specialty coatings industries seeking consistent, high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-performance, polyazo direct and reactive dyes for textiles like cotton and viscose.
• Specialty Ink Production: Used in formulating inks for jet printing, packaging, and security applications requiring specific color fastness and stability.
• Industrial Pigments: Serves as a precursor for creating pigments used in plastics, paints, and coatings where color consistency is critical.
• Laboratory & Research: Employed in chemical research for studying azo dye chemistry, photophysical properties, and developing new chromophores.
• Functional Dyes: Potential use in the development of dyes for non-textile applications, such as in optical data storage or as pH indicators.

Basic Information

Product Name	Disodium 4-Amino-3,6-Bis[[4-[(2,4-Dihydroxyphenyl)Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	93982-62-8
Molecular Formula	C40H24N8Na2O12S2
Molecular Weight	918.77 g/mol
Synonyms	Direct Black 166 (disodium salt); C.I. 30026; 4-Amino-3,6-bis[[4-[(2,4-dihydroxyphenyl)azo]phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid disodium salt; Disodium 4-amino-3,6-bis[(4-[(2,4-dihydroxyphenyl)azo]phenyl)azo]-5-hydroxynaphthalene-2,7-disulfonate; Azo Black Dye Intermediate; Polyazo Dye Intermediate; Tetrakisazo Dye Intermediate
EINECS	Contact for details

Quality Control

Our Disodium 4-Amino-3,6-Bis[[4-[(2,4-Dihydroxyphenyl)Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color strength, and impurity profiles. Certificates of Analysis (COA) documenting identity, assay, and related substances are available upon request to support your quality assurance protocols.

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.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%
Solubility (1% in Water)	Complete, clear solution

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