Description

Trisodium 4-Amino-3-[[4'-[(2,4-Dihydroxyphenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble polyazo dye complex valued for its intense color strength and stability. This compound is engineered to deliver consistent, reliable performance in demanding technical applications where precise coloration is critical. It is primarily utilized by manufacturers in the textile, leather, and specialty ink industries seeking advanced dyeing and printing solutions.

Application

• Textile Dyeing: 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 dye penetration and rich color.
• Ink Formulation: A key component in the production of specialty inks for industrial printing and packaging.
• Paper Coloration: Employed in the manufacturing of colored papers and paper products.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its chromophoric structure.
• Research & Development: Serves as a chemical intermediate or reference standard in organic synthesis and analytical chemistry research.

Basic Information

Item	Detail
Product Name	Trisodium 4-Amino-3-[[4'-[(2,4-Dihydroxyphenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	68318-35-4
Molecular Formula	C46H31N7Na3O14S3
Molecular Weight	~1083.0 g/mol
Synonyms	Direct Black 166; C.I. 30026; Trisodium 4-amino-5-hydroxy-3,6-bis[[4'-[2-(2,4-dihydroxyphenyl)diazenyl]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]diazenyl]naphthalene-2,7-disulphonate; Polyazo Black Dye; Leather Black DZ; Acid Black Dye (related class); Textile Black 166
EINECS	Contact for details

Quality Control

Our production of Trisodium 4-Amino-3-[[4'-[(2,4-Dihydroxyphenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate adheres to stringent quality management systems to ensure batch-to-batch consistency and performance reliability. Every lot is analyzed against key specifications for purity, color value, and solubility. A comprehensive Certificate of Analysis (COA) documenting these results is provided with each shipment 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening 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 (KF)	≤ 8.0 %
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0
Ash Content	≤ 25.0 %

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