Description

Disodium 4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate 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 target 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 colorants for their processes.

Application

This advanced azo dye is formulated for specialized industrial applications where color fastness and chemical compatibility are paramount.

• Textile Dyeing: Primary application for dyeing natural and synthetic fibers, particularly where deep, vibrant shades with good wash and light fastness are required.
• Leather Finishing: Used in the coloration of leather goods, providing uniform penetration and rich, lasting color.
• Specialty Inks: A key component in the formulation of high-performance inks for security printing, packaging, and other technical printing applications.
• Paper Coloring: Employed in the production of colored papers and paper products requiring specific hue and stability.
• Biological Staining (Research Grade): May be utilized in histological or cytological staining procedures in life science research laboratories.
• Plastics and Polymers: Can be incorporated for coloring certain types of plastics and polymeric materials.

Basic Information

Item	Details
Product Name	Disodium 4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	54804-85-2
Molecular Formula	C46H34N10Na2O10S2
Molecular Weight	989.92 g/mol
Synonyms	Direct Black 19; C.I. 35255; Azo Black; Pontamine Black E; Chlorazol Black E; Durazol Black G; Sirius Black G; Direct Deep Black EW
EINECS	259-356-5

Quality Control

Our production of Disodium 4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent purity, color strength, and application performance. Certificates of Analysis (COA) detailing specific batch results 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). This compound is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark blue-black to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Ash Content (Sulfated)	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm

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