Description

7-[[4-[(6-Ureido-1-hydroxy-3-sodiosulfo-2-naphthalenyl)azo]benzoyl]amino]-4-hydroxy-3-[[4-[(4-sodiosulfophenyl)azo]phenyl]azo]naphthalene-2-sulfonic acid sodium salt is a high-purity, complex azo dye intermediate essential for producing vivid and stable colorants. Its value lies in its sophisticated molecular structure, which provides excellent chromophore properties, lightfastness, and compatibility with various substrates. This compound is a critical raw material for manufacturers in the textile, ink, and specialty coatings industries seeking to develop high-performance dyes and pigments.

Application

• Primary intermediate for the synthesis of high-grade, polyazo reactive dyes and direct dyes used in textile coloring.
• Key chromophore component in the manufacture of inks for digital, packaging, and industrial printing applications.
• Used in the production of pigments and colorants for plastics, coatings, and specialty paints.
• Research and development chemical for creating novel functional dyes with specific optical or electronic properties.
• Potential use in the formulation of biological stains and indicators for laboratory and diagnostic purposes.
• Serves as a standard or reference material for quality control and analytical testing within dye manufacturing processes.

Basic Information

Item	Details
Product Name	7-[[4-[(6-Ureido-1-hydroxy-3-sodiosulfo-2-naphthalenyl)azo]benzoyl]amino]-4-hydroxy-3-[[4-[(4-sodiosulfophenyl)azo]phenyl]azo]naphthalene-2-sulfonic acid sodium salt
CAS No.	6428-16-6
Molecular Formula	C40H24N10Na3O14S3
Molecular Weight	1066.88 g/mol (approx.)
Synonyms	Direct Brown 1B; C.I. 30045; Direct Brown 1B Sodium Salt; 7-[[4-[(6-Carbamoylamino-1-hydroxy-3-sulfo-2-naphthyl)azo]benzoyl]amino]-4-hydroxy-3-[[4-(4-sulfophenyl)azo]phenyl]azo]-2-naphthalenesulfonic acid trisodium salt; Trisodium 7-[[4-[(6-carbamoylamino-1-hydroxy-3-sulfo-2-naphthyl)azo]benzoyl]amino]-4-hydroxy-3-[[4-(4-sulfophenyl)azo]phenyl]azo]naphthalene-2-sulfonate; Azo Dye Intermediate 6428-16-6
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) detailing batch-specific results are provided and available upon request to support your quality assurance protocols.

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 (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in Water)	Clear solution at 1%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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