Description

2-Naphthalenesulfonic acid, 6-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-3-[[4-[[4-[[7-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxy-, trisodium salt is a high-purity, synthetic organic dye belonging to the azo dye class, specifically engineered for demanding technical applications. Its complex polyazo structure provides exceptional color strength and specific affinity for various substrates, making it a critical component for achieving precise and durable coloration. This product is essential for manufacturers in the textile, leather, and specialty ink industries who require consistent, high-performance dyes for their production processes.

Application

• Textile Dyeing: Primary application for dyeing natural and synthetic fibers, particularly where high wash and light fastness are required.
• Leather Finishing: Used in the coloration of leather goods, providing rich, uniform shades with good penetration.
• Ink Manufacturing: A key colorant for the formulation of specialty inks, including those for packaging and security printing.
• Paper Coloration: Employed in the production of colored papers and paper products.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific chromogenic properties.
• Research & Development: Serves as a chemical intermediate or reference standard in organic synthesis and analytical chemistry research.

Basic Information

Product Name	2-Naphthalenesulfonic acid, 6-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-3-[[4-[[4-[[7-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxy-, trisodium salt
CAS No.	6428-38-2
Molecular Formula	C44H34N10Na3O14S3
Molecular Weight	1108.0 g/mol (approx.)
Synonyms	Acid Black 210; C.I. 300310; Trisodium 6-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-3-[[4-[[4-[[7-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-1-hydroxy-3-sulfo-2-naphthyl]azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxy-2-naphthalenesulfonate; Azo Black Dye; Leather Black Dye; Polyazo Dye; Textile Black Dye
EINECS	Contact for details

Quality Control

Our production of 2-Naphthalenesulfonic acid, 6-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-3-[[4-[[4-[[7-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxy-, trisodium salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure consistent color strength, purity, and application performance. We provide full traceability and detailed Certificates of Analysis (COA) upon request, confirming compliance with relevant industry specifications for dyes and colorants.

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). Keep away from strong oxidizing agents. Due to its complex organic nature, prolonged exposure to high humidity or extreme temperatures should be avoided to maintain product stability.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90%
Color Strength	100% ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Insoluble Matter	Max. 0.5%
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	6.0 - 8.0

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