Description

7-Amino-3-[[4-[(4-Amino-3-Sodiosulfophenyl)Azo]-1-Naphthalenyl]Azo]-4-Hydroxynaphthalene-2-Sulfonic Acid Sodium Salt 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 those requiring a disazo structure with enhanced solubility and color properties. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid and stable colorants.

Application

• Primary intermediate for the synthesis of disazo dyes and pigments used in textile coloration.
• Key building block in the production of acid dyes for nylon, silk, and wool fibers.
• Used in the manufacture of reactive dyes for cotton and other cellulosic materials.
• Precursor for specialty inks, including those for jet printing and security applications.
• Intermediate in the synthesis of lake pigments for use in plastics and coatings.
• Research and development of novel chromogenic agents for analytical chemistry and diagnostics.
• Starting material for functional dyes with potential applications in optical data storage or nonlinear optics.

Basic Information

Product Name	7-Amino-3-[[4-[(4-Amino-3-Sodiosulfophenyl)Azo]-1-Naphthalenyl]Azo]-4-Hydroxynaphthalene-2-Sulfonic Acid Sodium Salt
CAS No.	6226-99-9
Molecular Formula	C26H18N6Na2O7S2
Molecular Weight	660.56 g/mol
Synonyms	Acid Black 210; C.I. 300310; 7-Amino-4-hydroxy-3-[[4-[(4-amino-3-sulfophenyl)azo]-1-naphthyl]azo]naphthalene-2-sulfonic acid disodium salt; Disazo dye intermediate; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-6-[[4-[(4-amino-3-sulfophenyl)azo]-1-naphthalenyl]azo]-, sodium salt (1:2); Sodium 4-amino-5-hydroxy-6-({4-[(E)-(4-amino-3-sulfonatophenyl)diazenyl]naphthalen-1-yl}diazenyl)naphthalene-2-sulfonate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high chemical purity. Every lot is tested against established specifications for identity, purity, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing assay, heavy metal content, and other critical parameters is provided with each shipment 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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility (in Water)	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.