Description

Trisodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)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 provides excellent chromophoric properties, making 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, stable colors with specific fastness properties.

Application

• Textile Dyeing: Primary application as a key intermediate for the synthesis of reactive, direct, and acid dyes for cotton, wool, silk, and nylon fibers.
• Ink Manufacturing: Used in the production of high-quality pigments for printing inks, including those for packaging, textiles, and security applications.
• Specialty Coatings: Serves as a colorant intermediate in coatings for plastics, leather, and paper products requiring specific color strength and lightfastness.
• Liquid Crystal Displays (LCDs): Potential use as a dye intermediate for color filters in electronic display technologies.
• Biological Staining: Can be utilized in the development of histological stains for microscopy and diagnostic applications.
• Research & Development: Serves as a valuable building block in organic synthesis and materials science research for novel chromophores.

Basic Information

Product Name	Trisodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	70632-08-5
Molecular Formula	C46H32N8Na3O16S3
Molecular Weight	~1086.0 g/mol
Synonyms	Direct Black 22 (sodium salt); C.I. 35435; Trisodium 4-amino-3-[[4'-[(2-amino-4-hydroxyphenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-[(4-sulfophenyl)azo]naphthalene-2,7-disulfonate; 4-Amino-3-[[4'-[(2-amino-4-hydroxyphenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-[(4-sulfophenyl)azo]naphthalene-2,7-disulfonic acid trisodium salt; Direct Black EX; Pontamine Black EBN; Polyazo Black Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of Trisodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and batch-to-batch reliability. Certificates of Analysis (COA) detailing all specifications are provided with each 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, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	6.0 - 8.0
Ash Content (Sulfated)	Contact for details

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