Description

Trisodium 4-Amino-3-[[4'-[(4-Amino-2-Hydroxyphenyl)Azo][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 critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, colorfast, and chemically stable products.

Application

• Primary Intermediate for Reactive Dyes: Key building block for manufacturing high-grade reactive dyes used in cotton and cellulose fiber dyeing.
• Synthesis of Direct Dyes: Used in the production of direct dyes for paper, leather, and textile applications requiring good wet fastness.
• Specialty Pigment Manufacturing: Serves as a crucial intermediate for creating complex organic pigments with enhanced thermal and chemical stability for plastics and coatings.
• Inkjet Ink Formulations: Utilized in the synthesis of dyes for high-quality digital printing inks, contributing to color gamut and print durability.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying azo dye chemistry and photophysical properties.
• Functional Dye Synthesis: Potential intermediate for dyes used in non-textile applications such as sensors or light-harvesting materials.

Basic Information

Item	Details
Product Name	Trisodium 4-Amino-3-[[4'-[(4-Amino-2-Hydroxyphenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	83968-66-5
Molecular Formula	C40H24N8Na3O13S3
Molecular Weight	Approx. 1010.82 g/mol
Synonyms	Trisodium 4-amino-3-{[4'-({4-amino-2-hydroxyphenyl}diazenyl)[1,1'-biphenyl]-4-yl]diazenyl}-5-hydroxy-6-[(4-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate; Polyazo dye intermediate (Black); CI Direct Black 22 intermediate; Azo dye precursor; Tetrasodium salt variant may exist; Complex sulphonated azo compound; Direct dye intermediate.
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Each lot is analyzed using modern analytical techniques including HPLC and spectrophotometry to verify critical parameters such as assay purity, hue strength, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

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

Specification

Item	Specification
Appearance	Dark colored 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
Related Substances (HPLC)	Total impurities: Max. 5.0%

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