Description

Trisodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Methoxy-2-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, provides excellent chromophoric properties and solubility, making it a critical precursor for high-performance dyes. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid, stable colors. The CAS number for this compound is 93803-38-4.

Application

This advanced dye intermediate is engineered for demanding applications where color strength and chemical stability are paramount.

• Textile Dyeing: Primary use in the synthesis of reactive and direct dyes for cotton, wool, and nylon, offering excellent wash and light fastness.
• Inkjet Inks: A key component in the production of high-quality pigment inks for commercial and industrial printing, ensuring brilliant color reproduction.
• Leather Coloring: Used in formulating dyes for leather finishing, providing deep, uniform shades with good adhesion.
• Paper Coloring: Employed in the manufacture of dyes for specialty papers and packaging materials.
• Plastic and Polymer Coloring: Acts as a precursor for pigments used in coloring plastics and synthetic fibers.
• Biological Staining: Potential use in the synthesis of histological stains for laboratory and diagnostic applications.
• Research & Development: Serves as a valuable building block in organic synthesis and material science research for novel chromophores.

Basic Information

Item	Details
Product Name	Trisodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Methoxy-2-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	93803-38-4
Molecular Formula	C41H26N8Na3O14S3
Molecular Weight	~1012.85 g/mol (Contact for exact details)
Synonyms	Trisodium 4-amino-3-{[4'-({2-amino-4-hydroxyphenyl}diazenyl)[1,1'-biphenyl]-4-yl]diazenyl}-5-hydroxy-6-[(4-methoxy-2-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate; C.I. Direct Brown 202; Direct Brown 202; Polyazo dye intermediate; Tetrasodium salt variant may exist.
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality management systems to ensure batch-to-batch consistency and purity. Every lot undergoes comprehensive analysis using advanced techniques like HPLC and spectrophotometry to verify chemical identity and concentration. Certificates of Analysis (COA) documenting purity, impurity profile, and physical specifications are provided with each shipment. We support compliance with relevant global standards for industrial chemicals.

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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (in Water)	Completely soluble
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.