Description

4-hydroxy-5-[[4-[[4-[[1-hydroxy-6-(phenylamino)-3-sulpho-2-naphthyl]azo]-6-sulpho-1-naphthyl]azo]-1-naphthyl]azo]naphthalene-2,7-disulphonic acid, ammonium sodium salt 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, stable colors.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton and other cellulosic fibers.
• Direct Dye Production: Used in the manufacture of direct dyes for paper, leather, and textile applications requiring good wet fastness.
• Pigment Manufacturing: Serves as a precursor for creating lake pigments and other colorants used in inks and paints.
• Specialty Chemical Synthesis: Employed in research and development for novel chromophores and functional dyes.
• Analytical Reagents: Can be utilized in the formulation of specific indicators and stains for laboratory use.

Basic Information

Product Name	4-hydroxy-5-[[4-[[4-[[1-hydroxy-6-(phenylamino)-3-sulpho-2-naphthyl]azo]-6-sulpho-1-naphthyl]azo]-1-naphthyl]azo]naphthalene-2,7-disulphonic acid, ammonium sodium salt
CAS No.	83221-43-6
Molecular Formula	C46H30N8O16S4 • xNa • yNH4 (Contact for exact stoichiometry)
Molecular Weight	Contact for details
Synonyms	Ammonium sodium salt of C.I. Direct Brown 223; Direct Brown 223, ammonium sodium salt; C.I. 30035; Polyazo brown dye intermediate; Tetrakisazo dye intermediate; 4-Hydroxy-5-[(4-{[4-({1-hydroxy-6-[(phenyl)amino]-3-sulfo-2-naphthalenyl}azo)-6-sulfo-1-naphthalenyl]azo}-1-naphthalenyl)azo]-2,7-naphthalenedisulfonic acid, ammonium sodium salt; Benzenesulfonic acid, 4-hydroxy-5-((4-((4-((1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthyl)azo)-6-sulfo-1-naphthyl)azo)-1-naphthyl)azo)-, ammonium sodium salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive analytical methods including HPLC, UV-Vis spectroscopy, and titration to confirm identity, purity, and strength. 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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95% (or as per customer grade requirement)
Moisture (KF Titration)	Max. 5.0%
Water Solubility	Freely soluble
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.