Description

Trisodium 4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble polyazo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulphonate groups, makes it a key precursor for synthesizing high-performance dyes and pigments, particularly those requiring deep, stable shades and excellent substrate affinity. This compound is essential for manufacturers in the textile, leather, and specialty ink industries seeking to produce advanced coloring agents with superior fastness properties.

Application

• Primary Intermediate for Textile Dyes: Synthesis of high-grade direct, reactive, and acid dyes for cotton, wool, silk, and nylon, valued for their wash and light fastness.
• Leather Dye Production: Manufacturing of dyes for leather finishing, providing deep, uniform coloration with good penetration.
• Specialty Ink Formulation: Key component in producing pigments for inks used in packaging, security printing, and other high-performance applications.
• Paper Coloring Agent: Used in the manufacture of dyes for high-quality paper and paperboard.
• Research & Development: Serves as a critical building block in R&D for novel chromophores and functional dyes in academic and industrial laboratories.
• Dye for Polyamide Fibers: Effective in creating dyes for synthetic fibers like polyamide, offering strong color yield.

Basic Information

Item	Details
Product Name	Trisodium 4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	83562-72-5
Molecular Formula	C46H32N10Na3O16S4
Molecular Weight	~1194.06 g/mol
Synonyms	Direct Black 166 (sodium salt); C.I. 30026; Trisodium 4-amino-3-{[4'-[(2,4-diaminophenyl)diazenyl]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]diazenyl}-5-hydroxy-6-[(4-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate; Polyazo dye intermediate 83562-72-5; Direct Black 166 intermediate; 4-Amino-3-[[4'-[(2,4-diaminophenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-[(4-sulfophenyl)azo]naphthalene-2,7-disulfonic acid trisodium salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Each lot undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for strength, and wet chemistry for identification. A detailed Certificate of Analysis (COA) documenting assay, impurity profile, and physical specifications is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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