Description

2-[[2,4-Dihydroxy-3-[(4-Nitrophenyl)Azo]-5-[(4-Sulfophenyl)Azo]Phenyl]Azo]-5-Nitrobenzenesulfonic Acid is a complex, high-purity azo dye intermediate essential for producing vivid and durable synthetic colors. Its multi-azo structure provides exceptional chromophore strength and binding properties, making it a critical component for advanced colorant formulations. This compound is primarily required by manufacturers in the textile, leather, and specialty ink industries seeking to develop high-performance pigments and dyes with excellent fastness properties.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of high-grade, complex azo dyes for textiles, leather, and plastics.
• Specialty Ink Manufacturing: Used in the production of high-performance inks for security printing, packaging, and digital applications requiring specific color properties.
• Functional Colorant for Polymers: Imparts stable coloration to synthetic fibers, engineering plastics, and other polymer matrices.
• Research & Development: Employed in chemical R&D laboratories for developing novel chromophores and studying azo dye chemistry.
• Analytical Chemistry Reagent: Can be utilized as a standard or reagent in analytical methods for dye identification and quantification.

Basic Information

Product Name	2-[[2,4-Dihydroxy-3-[(4-Nitrophenyl)Azo]-5-[(4-Sulfophenyl)Azo]Phenyl]Azo]-5-Nitrobenzenesulfonic Acid
CAS No.	72139-03-8
Molecular Formula	C24H15N7O11S2
Molecular Weight	665.55 g/mol
Synonyms	Acid Black 210; C.I. 300310; 5-Nitro-2-[[2,4-dihydroxy-3-[(4-nitrophenyl)azo]-5-[(4-sulfophenyl)azo]phenyl]azo]benzenesulfonic acid; Benzenesulfonic acid, 5-nitro-2-[[2,4-dihydroxy-3-[(4-nitrophenyl)azo]-5-[(4-sulfophenyl)azo]phenyl]azo]-; 2-[[2,4-Dihydroxy-3-[(4-nitrophenyl)azo]-5-[(4-sulfophenyl)azo]phenyl]azo]-5-nitrobenzenesulfonate
EINECS	Contact for details

Quality Control

Our production of 2-[[2,4-Dihydroxy-3-[(4-Nitrophenyl)Azo]-5-[(4-Sulfophenyl)Azo]Phenyl]Azo]-5-Nitrobenzenesulfonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and physical properties are provided to guarantee traceability and compliance with your technical requirements.

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 when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Partially soluble

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