Description

4-[[2,4-Dihydroxy-5-[(4-Nitrophenyl)Azo]Phenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid is a high-purity, synthetic azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple azo linkages and sulfonic acid groups, provides excellent chromophoric properties and water solubility. This compound is essential for manufacturers requiring precise and vibrant colorants, particularly in the production of specialized dyes and pigments for textiles, inks, and analytical reagents.

Application

• Primary intermediate in the synthesis of high-value, water-soluble azo dyes for textile and leather coloring.
• Key precursor for manufacturing specialized pigments and colorants used in inks, coatings, and plastics.
• Used in the formulation of analytical reagents and biological stains for laboratory and diagnostic applications.
• Potential use as a colorimetric indicator or sensor in chemical analysis due to its pH-sensitive azo groups.
• Employed in research and development for novel functional dyes with applications in optics and electronics.

Basic Information

Product Name	4-[[2,4-Dihydroxy-5-[(4-Nitrophenyl)Azo]Phenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid
CAS No.	67786-16-7
Molecular Formula	C22H14N6O11S2
Molecular Weight	602.51 g/mol
Synonyms	Acid Black 210; C.I. 27720; 2,7-Naphthalenedisulfonic acid, 4-[[2,4-dihydroxy-5-[(4-nitrophenyl)azo]phenyl]azo]-5-hydroxy-; 5-Hydroxy-4-[[2,4-dihydroxy-5-[(4-nitrophenyl)azo]phenyl]azo]-2,7-naphthalenedisulfonic acid; 4-[(2,4-Dihydroxy-5-[(4-nitrophenyl)azo]phenyl)azo]-5-hydroxy-2,7-naphthalenedisulfonic acid; Azo dye intermediate 67786-16-7; Nitrophenyl azo naphthalenedisulfonic acid derivative
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 purity. Every lot is analyzed using advanced techniques including HPLC and spectrophotometry to confirm identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each shipment, ensuring full traceability and compliance with customer requirements.

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

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
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.