Description

Trisodium 4-Amino-3-[[4-[[[4-[(8-Amino-1-Hydroxy-5-Sulphonato-2-Naphthyl)Azo]Phenyl]Amino]Carbonyl]Phenyl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate is a high-purity, polyazo dye intermediate of significant industrial importance. Its complex molecular structure is engineered to deliver exceptional color strength and stability in demanding applications. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors seeking to produce high-performance dyes and pigments.

Application

This advanced dye intermediate is utilized in the synthesis of high-value colorants. Its primary and related applications include:

• Textile Dyeing: A key precursor for producing reactive, direct, and acid dyes for cotton, wool, nylon, and silk.
• Ink Manufacturing: Used in the formulation of high-quality printing inks, including those for packaging and security printing.
• Pigment Production: Serves as an intermediate in the manufacture of organic pigments for plastics, coatings, and masterbatches.
• Leather Coloring: Employed in the synthesis of dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the production of dyes for specialty paper and board.
• Research & Development: A valuable chemical for R&D laboratories focusing on novel chromophores and functional dyes.

Basic Information

Item	Details
Product Name	Trisodium 4-Amino-3-[[4-[[[4-[(8-Amino-1-Hydroxy-5-Sulphonato-2-Naphthyl)Azo]Phenyl]Amino]Carbonyl]Phenyl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	72829-11-9
Molecular Formula	C45H28N9Na3O14S3
Molecular Weight	~1083.9 g/mol
Synonyms	Trisodium 6-(Phenylazo)-4-amino-5-hydroxy-3-[[4-[[[4-[(8-amino-1-hydroxy-5-sulphonato-2-naphthyl)azo]phenyl]amino]carbonyl]phenyl]azo]naphthalene-2,7-disulphonate; C.I. Reactive Brown 18; Reactive Brown 18; Polyazo Dye Intermediate; Tetrasodium salt variant may exist.
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and spectrophotometry for color value, to ensure consistent performance and batch-to-batch reproducibility. Certificates of Analysis (COA) detailing all relevant specifications are available upon request.

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 or solid
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

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