Description

Trisodium 4-Amino-5-Hydroxy-3-[[4-[[4-(Phenylamino)-5-Sulphonato-1-Naphthyl]Azo]Phenyl]Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate known for its complex polyazo structure and excellent chromophoric properties. This compound is critical for synthesizing high-value, colorfast dyes and pigments, offering superior tinctorial strength and stability in demanding applications. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries who require consistent, high-performance colorants for their formulations.

Application

• Textile Dyeing: A key intermediate for producing high-grade, wash-fast azo dyes for cotton, wool, and synthetic fibers.
• Ink Manufacturing: Used in the synthesis of pigments for industrial printing inks, including packaging and security inks.
• Specialty Coatings: Serves as a precursor for colorants in automotive, industrial, and architectural coatings requiring UV and chemical resistance.
• Leather Coloring: Employed in the production of dyes for high-quality leather finishing.
• Paper Coloring: Used in the manufacture of dyes for specialty and decorative papers.
• Research & Development: A valuable chemical for R&D labs focusing on novel dye synthesis, photochemistry, and material science.

Basic Information

Product Name	Trisodium 4-Amino-5-Hydroxy-3-[[4-[[4-(Phenylamino)-5-Sulphonato-1-Naphthyl]Azo]Phenyl]Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	68155-61-3
Molecular Formula	C44H27N7Na3O13S4
Molecular Weight	1084.94 g/mol (approx.)
Synonyms	Trisodium 4-Amino-5-hydroxy-3-((4-((4-(phenylamino)-5-sulfo-1-naphthyl)azo)phenyl)azo)-6-(phenylazo)naphthalene-2,7-disulfonate; C.I. Direct Brown 1:3; Direct Brown 1:3; Polyazo Brown Dye Intermediate; 68155-61-3; Trisodium salt of a complex polyazo dye
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for critical applications. Certificates of Analysis (COA) documenting all relevant parameters are provided to guarantee traceability and compliance with your quality standards.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

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

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