Description

5-[[2,4-Dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]-2,7-naphthalenedisulfonic acid disodium salt is a high-purity, multi-azo dye intermediate of significant commercial importance. Its complex molecular structure provides unique chromophoric properties, making it a critical component for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants with specific lightfastness and hue characteristics.

Application

• Primary Intermediate for High-Performance Dyes: Synthesis of complex azo dyes for textile fibers, including polyamide and protein-based materials.
• Specialty Pigment Manufacturing: Key precursor in the production of pigments for industrial inks, paints, and coatings requiring enhanced color strength.
• Research & Development: Used in chemical research for developing novel chromophores and studying structure-color relationships in dye chemistry.
• Analytical Reagent: Potential use as a staining agent or colorimetric indicator in specific laboratory and analytical procedures.

Basic Information

Product Name	5-[[2,4-Dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]-2,7-naphthalenedisulfonic acid disodium salt
CAS No.	72749-86-1
Molecular Formula	C34H18N12O18S2 · 2Na
Molecular Weight	Contact for details
Synonyms	Disodium 5-[[2,4-dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]-2,7-naphthalenedisulfonate; CI 28400; Azo Dye Intermediate 72749-86-1; Tetrakisazo dye intermediate; 2,7-Naphthalenedisulfonic acid derivative; Acid Black 210 intermediate; 5-[{2,4-Dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)hydrazono]-3-[(4-nitrophenyl)hydrazono]phenyl}hydrazono]-4-hydroxy-3-[(4-nitrophenyl)hydrazono]-2,7-naphthalenedisulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Quality is verified through comprehensive analytical techniques including HPLC, UV-Vis spectroscopy, and elemental analysis. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles 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 room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark colored powder or solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95% (Typical, higher grades available)
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	Contact for details

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