Description

Tetrasodium 4,4'-Bis[[5-[[5-(Aminosulphonyl)-2-Hydroxyphenyl]Azo]-1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo][1,1'-Biphenyl]-3,3'-Dicarboxylate is a high-purity, water-soluble anionic dye belonging to the class of complex polyazo compounds. This chemical is valued for its exceptional color strength, stability, and affinity to various substrates, making it a critical component in demanding industrial coloration processes. It is primarily sought after by manufacturers in the textile, leather, and specialty paper industries who require consistent, high-performance dyes for their products.

Application

• Textile Dyeing: Used for dyeing natural and synthetic fibers, particularly where high wash and light fastness are required.
• Leather Finishing: Applied in the coloration of leather goods, providing deep, uniform shades with good penetration.
• Paper Coloring: Employed in the production of specialty papers, including decorative and packaging papers.
• Ink Formulation: Serves as a key pigment/dye in the manufacture of industrial inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific affinity.
• Research & Development: Utilized as a standard or intermediate in chemical research and for developing new coloring materials.

Basic Information

Item	Details
Product Name	Tetrasodium 4,4'-Bis[[5-[[5-(Aminosulphonyl)-2-Hydroxyphenyl]Azo]-1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo][1,1'-Biphenyl]-3,3'-Dicarboxylate
CAS No.	72139-19-6
Molecular Formula	C68H40N12Na4O22S4
Molecular Weight	Approx. 1609.3 g/mol
Synonyms	Direct Black 166; C.I. 30026; Tetrasodium 6,6'-((3,3'-dicarboxy[1,1'-biphenyl]-4,4'-diyl)bis(azo))bis(5-((5-(aminosulfonyl)-2-hydroxyphenyl)azo)-4-hydroxy-3-((phenylamino)sulfonyl)-2-naphthalenesulfonate); C.I. Direct Black 166; Direct Black 166, Tetrasodium Salt; [1,1'-Biphenyl]-3,3'-dicarboxylic acid, 4,4'-bis[[5-[[5-(aminosulfonyl)-2-hydroxyphenyl]azo]-1-hydroxy-6-[(phenylamino)sulfonyl]-3-sulfo-2-naphthalenyl]azo]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 4,4'-Bis[[5-[[5-(Aminosulphonyl)-2-Hydroxyphenyl]Azo]-1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo][1,1'-Biphenyl]-3,3'-Dicarboxylate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure consistency in color strength, purity, and solubility. Certificates of Analysis (COA) detailing key parameters are provided with each shipment to guarantee compliance with your specifications and industry standards.

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 tightly sealed when not in use 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)	≥ 90% (Dye Content)
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	7.0 - 9.0
Ash Content	≤ 30%
Heavy Metals (as Pb)	≤ 20 ppm

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