Description

5-Amino-3-[[4'-[(6-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, polyazo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple azo linkages and sulphonic acid groups, makes it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant, colorfast, and chemically stable products.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-grade, polyazo direct dyes and acid dyes for textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of high-performance organic pigments for inks, plastics, and coatings, offering excellent tinting strength and durability.
• Specialty Colorants: Employed in the formulation of specialized dyes for leather, paper, and food colorants (where specific purity grades and regulatory compliance are met).
• Research & Development: Acts as a valuable chemical entity in R&D laboratories for developing novel chromophores and studying dye-sensitized systems.
• Analytical Reagent: Can be utilized as a staining agent or a complexometric indicator in specific analytical chemistry applications.

Basic Information

Product Name	5-Amino-3-[[4'-[(6-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	94199-55-0
Molecular Formula	C32H22N6O10S3•Nax (x≈3)
Molecular Weight	Approx. 800-850 g/mol (as sodium salt)
Synonyms	C.I. Direct Brown 223; Direct Brown 223; 5-Amino-4-hydroxy-3-[[4'-[(6-amino-1-hydroxy-3-sulfo-2-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulfonic acid trisodium salt; Azo Brown 223; Trisodium 5-amino-3-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]biphenyl-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate; Polyazo Dye Intermediate Brown 223
EINECS	Contact for details

Quality Control

Our production of 5-Amino-3-[[4'-[(6-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for color strength, and tests for residual solvents and inorganic salts, ensuring consistent performance and batch-to-batch reliability. Certificates of Analysis (COA) detailing all specifications are provided and can be tailored to meet specific customer requirements.

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 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%
Color Strength	100% ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
Ash Content (Sulfated)	Max. 30.0%
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.