Description

Trisodium 4-Amino-3-[[4-[(4-Amino-2-Hydroxyphenyl)Azo]Phenyl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble polyazo dye intermediate of significant industrial importance. This compound is valued for its ability to impart strong, vibrant color properties in advanced dye synthesis. It is primarily required by manufacturers in the textile, ink, and specialty chemical sectors for producing high-performance dyes and pigments.

Application

• Primary Intermediate for Reactive and Direct Dyes: A key building block in the synthesis of high-quality dyes for cotton, wool, and nylon textiles.
• Specialty Ink Formulations: Used in the production of inks for digital textile printing and other high-resolution applications.
• Functional Dye Synthesis: Serves as a precursor for dyes used in biological staining, sensors, and other high-tech applications.
• Leather and Paper Coloring: Employed in the dyeing processes for leather goods and specialty papers.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and colorants with specific properties.

Basic Information

Item	Details
Product Name	Trisodium 4-Amino-3-[[4-[(4-Amino-2-Hydroxyphenyl)Azo]Phenyl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	83968-71-2
Molecular Formula	C34H21N7Na3O13S3
Molecular Weight	Contact for details
Synonyms	Trisodium 4-Amino-5-hydroxy-3,6-bis[(4-sulfophenyl)azo]-2,7-naphthalenedisulfonate; Polyazo dye intermediate; C.I. Direct Brown 1:2; Tetrasodium 4-amino-5-hydroxy-3,6-bis[(4-sulfonatophenyl)diazenyl]-2,7-naphthalenedisulfonate; 83968-71-2; Direct Brown 1:2; Trisodium salt of a polyazo naphthalene dye
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 purity. Every lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to guarantee compliance with your technical requirements.

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 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%
Loss on Drying	≤ 5.0%
Sulfated Ash	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.