Description

Disodium 4-[[2,4-Dihydroxy-5-[(2-Hydroxy-4-Nitrophenyl)Azo]-3-[(4-Nitrophenyl)Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate known for its complex molecular structure and specific chromophoric properties. This compound is valued for its ability to impart vivid and stable coloration, making it a critical component in the production of specialized dyes and pigments. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries for developing high-performance colorants.

Application

• Textile Dyeing: As a key intermediate for synthesizing high-grade, wash-fast azo dyes for natural and synthetic fibers.
• Ink Formulation: Used in the production of specialized printing inks, including those for packaging and security applications.
• Industrial Pigments: Serves as a precursor for creating organic pigments used in plastics, paints, and coatings.
• Leather Coloring: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the manufacture of dyes for high-quality paper and specialty paper products.
• Research & Development: Acts as a reference standard and building block in chemical research for new chromophores and functional materials.

Basic Information

Product Name	Disodium 4-[[2,4-Dihydroxy-5-[(2-Hydroxy-4-Nitrophenyl)Azo]-3-[(4-Nitrophenyl)Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	93939-99-2
Molecular Formula	C34H20N8O16S2Na2
Molecular Weight	906.73 g/mol
Synonyms	Disodium 4-[(2,4-dihydroxy-5-[(2-hydroxy-4-nitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl)azo]-5-hydroxynaphthalene-2,7-disulphonate; CI 27290; Acid Black 210; Azo Black Dye Intermediate; 4-[[2,4-Dihydroxy-5-[(2-hydroxy-4-nitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our production of Disodium 4-[[2,4-Dihydroxy-5-[(2-Hydroxy-4-Nitrophenyl)Azo]-3-[(4-Nitrophenyl)Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and spectrophotometry for color strength, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) documenting identity, purity, and impurity profiles are available upon request.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Ash Content (Sulfated)	≤ 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.