Description

4-[[3-[[3-[[4,5-Dihydro-3-methyl-5-oxo-4-[(4-sulfophenyl)azo]-1H-pyrazol]-1-yl]phenyl]azo]-2,4-dihydroxyphenyl]azo]-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid is a high-purity, complex azo dye intermediate essential for producing vivid and stable colorants. Its multi-azo and sulfonic acid structure provides excellent water solubility and strong chromophore properties, making it a critical component for achieving specific, high-performance hues. This compound is primarily required by manufacturers in the textile, ink, and specialty dye industries seeking reliable and consistent raw materials for their formulations.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon, offering excellent wash and light fastness.
• Ink Manufacturing: Used in the production of high-quality pigments for inks in packaging, printing, and writing instruments.
• Leather Coloring: Employed in the formulation of dyes for leather goods, providing deep, uniform coloration.
• Paper Staining: Utilized in the paper industry for coloring specialty papers and cardboard.
• Biological Staining: Potential use as a precursor for histological stains in laboratory and diagnostic applications.
• Research & Development: Serves as a valuable chemical entity for academic and industrial R&D in organic synthesis and color chemistry.

Basic Information

Product Name	4-[[3-[[3-[[4,5-Dihydro-3-methyl-5-oxo-4-[(4-sulfophenyl)azo]-1H-pyrazol]-1-yl]phenyl]azo]-2,4-dihydroxyphenyl]azo]-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid
CAS No.	68134-18-9
Molecular Formula	C39H28N10O13S3
Molecular Weight	940.88 g/mol
Synonyms	Acid Black 210; C.I. 300310; 2,7-Naphthalenedisulfonic acid, 4-[[3-[[3-[[4,5-dihydro-3-methyl-5-oxo-4-[(4-sulfophenyl)azo]-1H-pyrazol-1-yl]phenyl]azo]-2,4-dihydroxyphenyl]azo]-5-hydroxy-6-(phenylazo)-; Reactive Black 5 related intermediate; Azo dye intermediate 68134-18-9; Trisazo dye intermediate; 4-[3-[3-[4,5-Dihydro-3-methyl-5-oxo-4-(4-sulfophenylazo)-1H-pyrazol-1-yl]phenylazo]-2,4-dihydroxyphenylazo]-5-hydroxy-6-phenylazo-2,7-naphthalenedisulfonic acid
EINECS	Contact for details

Quality Control

Our production of 4-[[3-[[3-[[4,5-Dihydro-3-methyl-5-oxo-4-[(4-sulfophenyl)azo]-1H-pyrazol]-1-yl]phenyl]azo]-2,4-dihydroxyphenyl]azo]-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical properties. Our quality systems are designed to meet the rigorous demands of industrial dye synthesis, ensuring reliable performance in your downstream applications.

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 performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Ash Content	≤ 1.0%
Solubility (in Water)	Freely soluble

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