Description

Disodium 4-[[2,4-Dihydroxy-3-[(2-Hydroxy-4-Nitrophenyl)Azo]-5-[(4-Nitrophenyl)Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate CAS NO 93939-98-1 is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its complex polyazo structure provides excellent chromophoric properties, making it a critical precursor for the manufacture of high-performance dyes and pigments. This compound is essential for industries requiring vibrant, durable colorants, particularly in textile dyeing, ink formulation, and specialty coatings.

Application

• Primary Intermediate for Dye Synthesis: A key building block in the production of acid dyes, direct dyes, and reactive dyes for textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the synthesis of high-performance organic pigments for plastics, inks, and coatings, offering good lightfastness and thermal stability.
• Specialty Ink Formulation: Employed in the creation of colorants for jet printing inks and other specialty printing applications.
• Research & Development: Serves as a valuable chemical entity in R&D laboratories for developing new chromophores and studying azo dye chemistry.
• Analytical Chemistry: Can be utilized as a staining agent or a colorimetric indicator in specific analytical procedures.

Basic Information

Item	Details
Product Name	Disodium 4-[[2,4-Dihydroxy-3-[(2-Hydroxy-4-Nitrophenyl)Azo]-5-[(4-Nitrophenyl)Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	93939-98-1
Molecular Formula	C34H20N8Na2O16S2
Molecular Weight	906.73 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 5-hydroxy-4-[[2,4-dihydroxy-3-[(2-hydroxy-4-nitrophenyl)azo]-5-[(4-nitrophenyl)azo]phenyl]azo]naphthalene-2,7-disulphonate; 4-[[2,4-Dihydroxy-3-[(2-hydroxy-4-nitrophenyl)azo]-5-[(4-nitrophenyl)azo]phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid disodium salt; Polyazo Black Dye Intermediate; Azo Dye Intermediate 93939-98-1
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed when not in use to prevent moisture absorption and degradation.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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