Description

Trisodium 5-Amino-3-[[4-[[4-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]Phenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate known for its complex polyazo structure and multiple sulfonate groups, which impart excellent solubility and chromophoric properties. This compound is critical for synthesizing high-value, colorfast dyes and pigments, particularly in applications requiring specific shades of black, blue, or green with strong adherence to substrates. It is primarily needed by manufacturers in the textile, leather, ink, and specialty chemical industries who require precise and reliable intermediates for producing advanced coloring agents.

Application

• Textile Dyeing: A key intermediate for the synthesis of reactive, direct, and acid dyes used for coloring cotton, wool, silk, and nylon fabrics.
• Leather Processing: Used in the production of dyes for imparting deep, uniform colors to leather goods.
• Ink Manufacturing: Serves as a precursor for high-performance pigments in printing inks, including inks for packaging and security applications.
• Paper Coloring: Employed in the manufacture of dyes for specialty papers and paper products.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.
• Research & Development: Used as a standard or building block in chemical research for developing new polymeric dyes and functional materials.

Basic Information

Product Name	Trisodium 5-Amino-3-[[4-[[4-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]Phenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	52469-75-7
Molecular Formula	C40H23N9Na3O13S3
Molecular Weight	1010.81 g/mol (approx.)
Synonyms	Direct Black 22 (sodium salt); C.I. 35435; Polyazo black dye intermediate; Trisodium 3,3',3'',3'''-([1,1'-biphenyl]-4,4'-diylbis(azo))bis(5-amino-4-hydroxynaphthalene-2,7-disulphonate); 5-Amino-4-hydroxy-3,3',3'',3'''-([1,1'-biphenyl]-4,4'-diylbis(azo))tris(naphthalene-2,7-disulphonic acid) trisodium salt; Azo dye intermediate 52469-75-7; Black 22 intermediate
EINECS	Contact for details

Quality Control

Our Trisodium 5-Amino-3-[[4-[[4-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]Phenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, impurity profile, and solubility. Our quality commitment aligns with industry standards for dye intermediates.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Solubility (in Water)	Freely soluble
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm

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