Description

Trisodium 4-Amino-3-[[4-[[4-[(4-Amino-2-Hydroxyphenyl)Azo]Phenyl]Amino]-3-Sulphonatophenyl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate is a high-purity, water-soluble polyazo dye intermediate. This compound is valued for its ability to impart specific color properties and its role as a critical building block in the synthesis of complex dyes and pigments. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Reactive Dyes: Synthesis of high-washfastness reactive dyes for cotton and cellulose fiber dyeing.
• Production of Acid Dyes: Manufacturing of acid dyes used for coloring wool, silk, and nylon.
• Specialty Ink Formulations: Key component in the production of high-quality inks for digital textile printing and security inks.
• Functional Pigment Synthesis: Building block for creating complex organic pigments with enhanced thermal and light stability.
• Research & Development: Used in chemical R&D for developing novel chromophores and studying azo dye chemistry.
• Industrial Colorant Production: Serves as a precursor in the manufacture of industrial colorants for plastics and coatings.

Basic Information

Item	Details
Product Name	Trisodium 4-Amino-3-[[4-[[4-[(4-Amino-2-Hydroxyphenyl)Azo]Phenyl]Amino]-3-Sulphonatophenyl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	94249-18-0
Molecular Formula	C40H26N10Na3O13S3
Molecular Weight	1011.85 g/mol
Synonyms	Trisodium 6-(Phenylazo)-4-amino-5-hydroxy-3-[[4-[[4-[(4-amino-2-hydroxyphenyl)azo]phenyl]amino]-3-sulfophenyl]azo]naphthalene-2,7-disulfonate; Polyazo dye intermediate; Reactive Black 5 precursor; C.I. 20505 intermediate; Tetrasodium 4-Amino-5-hydroxy-3-((4-((4-((2-hydroxy-5-((4-sulfophenyl)azo)phenyl)amino)phenyl)azo)-3-sulfophenyl)azo)-6-(phenylazo)naphthalene-2,7-disulfonate (related form); Azo dye coupling component; Sulfonated polyazo compound
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is tested against rigorous in-house specifications, with key parameters including HPLC purity, heavy metal content, and sulfonate group content verified. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles 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, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfonate Content	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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