Description

Trisodium 4-[[2,4-Dihydroxy-3-[(4-Methoxyphenyl)Azo]-5-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-5-Hydroxynaphthalene-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 primarily sought by manufacturers in the textile, leather, and specialty ink industries who require consistent, high-quality intermediates for producing vibrant and colorfast products.

Application

• Textile Dyeing: As a key intermediate for the synthesis of reactive and direct dyes used on cotton, wool, and nylon fibers.
• Leather Finishing: Used in the production of dyes for coloring leather goods, providing deep, uniform shades.
• Ink Manufacturing: Serves as a precursor for pigments in specialty printing inks, including inks for packaging and security applications.
• Paper Coloring: Employed in the synthesis of dyes for high-grade paper and paperboard products.
• Research & Development: Utilized as a standard or building block in chemical research for developing new colorants and functional materials.
• Plastic and Polymer Coloring: Acts as an intermediate for creating colorants suitable for certain plastic matrices.

Basic Information

Product Name	Trisodium 4-[[2,4-Dihydroxy-3-[(4-Methoxyphenyl)Azo]-5-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	70210-23-0
Molecular Formula	C39H24N8Na3O16S4
Molecular Weight	~1082.88 g/mol
Synonyms	Trisodium 4-[[2,4-dihydroxy-3-[(4-methoxyphenyl)azo]-5-[[4-[(4-nitro-2-sulfonatophenyl)amino]phenyl]azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulfonate; C.I. Reactive Brown 9; Reactive Brown 9; Polyazo dye intermediate; Tetrasodium salt variant may exist; Azo dye precursor; Sulfonated azo compound
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity suitable for industrial synthesis. Quality is verified through a battery of tests including identification, assay, and impurity profiling. A Certificate of Analysis (COA) detailing specific results for purity, heavy metal content, and other critical parameters is provided with every shipment to support your quality assurance processes.

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). This material is hygroscopic (moisture-sensitive); ensure containers are kept sealed to prevent absorption of atmospheric moisture which may affect product performance.

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

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