Description

Disodium 4-[[2,4-Dihydroxy-3,5-Bis(Phenylazo)Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate of significant commercial importance. Its complex polyazo structure provides excellent chromophoric properties, making it a critical precursor for producing vivid and stable colorants. This compound is essential for manufacturers in the textile, ink, and specialty pigment industries seeking to develop high-performance dyes with specific hue and fastness characteristics.

Application

• Primary intermediate for the synthesis of high-grade azo dyes and pigments used in textile coloration.
• Key component in manufacturing specialty inks for packaging, security printing, and digital applications.
• Precursor for industrial colorants applied in plastics, coatings, and leather finishing.
• Used in research and development for novel functional dyes with potential applications in optics and electronics.
• Employed in the production of biological stains and histological dyes for laboratory and diagnostic use.

Basic Information

Product Name	Disodium 4-[[2,4-Dihydroxy-3,5-Bis(Phenylazo)Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	97404-05-2
Molecular Formula	C34H22N6Na2O11S2
Molecular Weight	800.68 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 5-hydroxy-4-[[2,4-dihydroxy-3,5-bis(phenylazo)phenyl]azo]naphthalene-2,7-disulphonate; 5-Hydroxy-4-[[2,4-dihydroxy-3,5-bis(phenylazo)phenyl]azo]-2,7-naphthalenedisulfonic acid disodium salt; Polyazo dye intermediate; Azo dye precursor for black/brown shades
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high chemical purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

Specification

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

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