Description

4-[[2,4-Dihydroxy-5-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-3-[(4-Nitrophenyl)Azo]Phenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid is a high-purity, polyazo dye intermediate characterized by its complex molecular structure and multiple sulfonic acid groups, which impart excellent water solubility and chromophoric properties. This compound is valued for its ability to produce intense and stable colors, making it a critical precursor in the synthesis of specialized dyes and pigments. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for developing high-performance colorants.

Application

• Textile Dye Intermediate: A key building block for synthesizing acid dyes and reactive dyes used on nylon, wool, silk, and other protein fibers.
• Inkjet Ink Formulation: Used in the production of high-quality colorants for industrial and commercial inkjet printing, offering good lightfastness and water resistance.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments with specific hue and performance characteristics for plastics and coatings.
• Biological Staining Agent: Potential use in the development of histological stains for microscopy due to its strong affinity for certain tissue components.
• Analytical Chemistry Reagent: Can be employed as a chromogenic agent or indicator in specific spectrophotometric analytical methods.
• Research & Development: Utilized in chemical research for studying azo coupling reactions and developing novel functional dyes.

Basic Information

Product Name	4-[[2,4-Dihydroxy-5-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-3-[(4-Nitrophenyl)Azo]Phenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid
CAS No.	71799-74-1
Molecular Formula	C28H16N8O16S2
Molecular Weight	784.60 g/mol
Synonyms	Acid Black 210; C.I. 300310; 2,7-Naphthalenedisulfonic acid, 4-[[2,4-dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]-5-hydroxy-; Polyazo dye intermediate; Trisazo dye intermediate; Light-sensitive azo dye; Water-soluble azo compound
EINECS	Contact for details

Quality Control

Our 4-[[2,4-Dihydroxy-5-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-3-[(4-Nitrophenyl)Azo]Phenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and solubility are 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). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to prevent degradation.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Solubility	Freely soluble
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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