Description

Sodium 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2,7-disulphonate is a high-purity, complex disazo dye intermediate essential for producing vibrant and durable colorants. This compound matters for its role as a critical building block in synthesizing specialized dyes with excellent light and wash fastness properties. Industries such as textile manufacturing, ink production, and specialty coatings rely on this consistent-quality intermediate to achieve precise color shades and performance characteristics in their final products.

Application

• Primary Intermediate for Textile Dyes: A key precursor in the synthesis of high-performance direct, reactive, and acid dyes for cotton, wool, silk, and nylon.
• Specialty Ink Formulations: Used in manufacturing pigments for inks requiring specific color strength and stability, including packaging and security inks.
• Leather Coloring: Employed in the production of dyes for leather finishing, providing rich, even coloration.
• Paper Dyeing: Serves as an intermediate for dyes used in coloring high-quality papers and paper products.
• Research & Development: Utilized in chemical R&D for developing new chromophores and studying azo dye chemistry and applications.
• Industrial Coatings: A component in the synthesis of colorants for certain industrial and decorative coatings.

Basic Information

Product Name	Sodium 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2,7-disulphonate
CAS No.	83221-67-4
Molecular Formula	C44H30N12O14S4 · xNa
Molecular Weight	Contact for details
Synonyms	Direct Black 22 intermediate; C.I. 35435 intermediate; Disazo dye intermediate; Sodium 3,3'-((4-((4-aminophenyl)amino)-3-sulfophenyl)diazenyl)bis(6-((2,4-diaminophenyl)diazenyl)-4-hydroxy-2,7-naphthalenedisulfonate); Tetrasulfonated disazo dye; Azo dye precursor for black/brown shades; 83221-67-4
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and purity for reliable downstream synthesis. Quality is verified through analytical methods including HPLC, UV-Vis spectroscopy, and titration to confirm identity, strength, and impurity profiles. A Certificate of Analysis (COA) detailing all relevant specifications 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, well-ventilated area at a controlled 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, which can affect product stability and handling properties.

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%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 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.