Description

2,7-Naphthalenedisulfonic Acid, 5-[[2,4-Dihydroxy-5-[[4-( Phenylamino)-3-Sulfophenyl]Azo]Phenyl]Azo]-4-Hydroxy -3-[(4-Nitrophenyl)Azo]- is a high-purity, complex azo dye intermediate. This compound is engineered to deliver exceptional color strength and structural stability for the synthesis of advanced dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-grade, complex azo dyes for textiles and fabrics.
• Pigment Manufacturing: Used in the production of organic pigments for inks, paints, and industrial coatings requiring specific color fastness.
• Specialty Colorants: Suitable for creating specialized dyes used in leather finishing, paper coloring, and plastic coloration.
• Research & Development: Serves as a critical reagent in chemical R&D for developing new chromophores and functional dyes.
• Analytical Chemistry: Can be utilized as a standard or reagent in specific colorimetric analytical methods.

Basic Information

Item	Details
Product Name	2,7-Naphthalenedisulfonic Acid, 5-[[2,4-Dihydroxy-5-[[4-( Phenylamino)-3-Sulfophenyl]Azo]Phenyl]Azo]-4-Hydroxy -3-[(4-Nitrophenyl)Azo]-
CAS No.	72138-99-9
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Acid Black 210; Acid Black 210; 5-[[2,4-Dihydroxy-5-[(4-(phenylamino)-3-sulfophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]-2,7-naphthalenedisulfonic acid; 2,7-Naphthalenedisulfonic acid, 5-[[2,4-dihydroxy-5-[[4-(phenylamino)-3-sulfophenyl]azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]-; Black 210; Acid Leather Black 210
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Every batch is analyzed to confirm identity, purity, and consistency. Certificates of Analysis (COA) are available upon request, detailing all relevant specifications and test results.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials. Due to its light-sensitive nature, minimize exposure during handling and transfer.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 2.0%
Ash Content	Max. 1.0%
Heavy Metals	Max. 20 ppm

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