Description

3-Amino-4-[[4'-[(4-Ethoxyphenyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]-2,7-Naphthalenedisulfonic Acid Disodium Salt is a high-purity, water-soluble diazo dye intermediate of significant commercial importance. Its primary value lies in its role as a key precursor for synthesizing a range of vivid and stable azo dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants. Its disulfonic acid salt form ensures excellent solubility for efficient downstream processing.

Application

• Primary Intermediate for Azo Dyes: A critical building block in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring nylon, silk, wool, and paper.
• Textile Industry: Used in the production of dyes for fabrics requiring bright shades and good wash-fastness properties.
• Ink Manufacturing: Serves as a precursor for pigments and dyes used in printing inks, including those for packaging and publications.
• Specialty Coatings and Paints: Employed in the development of colorants for industrial and artistic paints and coatings.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.
• Research & Development: A valuable chemical for academic and industrial R&D focused on novel chromophores, functional materials, and dye chemistry.

Basic Information

Item	Details
Product Name	3-Amino-4-[[4'-[(4-Ethoxyphenyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]-2,7-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	6528-39-8
Molecular Formula	C36H26N6Na2O8S2
Molecular Weight	780.73 g/mol
Synonyms	Acid Black 210; C.I. 300310; Direct Black 166; 3-Amino-4-{[4'-(4-ethoxyphenylazo)[1,1'-biphenyl]-4-yl]azo}-2,7-naphthalenedisulfonic acid disodium salt; Disodium 3-amino-4-{[4'-(4-ethoxyphenylazo)[1,1'-biphenyl]-4-yl]azo}naphthalene-2,7-disulphonate; 2,7-Naphthalenedisulfonic acid, 3-amino-4-[[4'-[(4-ethoxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-, disodium salt
EINECS	Contact for details

Quality Control

Our production of 3-Amino-4-[[4'-[(4-Ethoxyphenyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]-2,7-Naphthalenedisulfonic Acid Disodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and batch-to-batch reliability. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical specifications. Our quality systems are designed to meet the exacting standards of industrial dye and pigment synthesis.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

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

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