Description

Trisodium 4-Amino-3-[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo 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, colorfast products.

Application

• Primary Intermediate for Textile Dyes: Key building block for synthesizing direct, reactive, and acid dyes used on cotton, wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of high-quality organic pigments for inks, plastics, and paints.
• Specialty Inks: A crucial component in formulating inks for digital textile printing and other advanced printing applications.
• Leather Dyeing: Employed in the formulation of dyes for achieving deep, uniform coloration on leather goods.
• Paper Coloring: Used in the manufacture of dyes for specialty paper and paperboard products.
• Research & Development: Serves as a reference standard and starting material in chemical R&D for novel colorants.

Basic Information

Item	Details
Product Name	Trisodium 4-Amino-3-[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	53050-46-7
Molecular Formula	C34H21N9Na3O13S3
Molecular Weight	960.78 g/mol
Synonyms	Direct Black 19 (Parent Dye); C.I. 35255; Trisodium 4-amino-3,6-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulphonate; Polyazo dye intermediate; Azo dye precursor CAS 53050-46-7
EINECS	Contact for details

Quality Control

Our Trisodium 4-Amino-3-[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Azo]-5-Hydroxy-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye synthesis. Certificates of Analysis (COA) documenting batch-specific results are available upon request to support your quality assurance protocols.

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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Solubility (in Water)	Clear, complete solution

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