Description

2,7-Naphthalenedisulfonic Acid, 4-[[3-[(3-Amino-4-Nitrophenyl) Azo]-2,4-Dihydroxyphenyl]Azo]-5-Hydroxy-, Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex molecular structure is engineered to deliver precise color properties and strong binding affinity in demanding applications. This compound is primarily required by manufacturers in the textile, ink, and specialty chemical synthesis industries for producing vibrant and durable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical building block in the synthesis of high-performance, polyazo dyes for textiles, leather, and paper.
• Textile Dyeing and Printing: Used in the formulation of dyes for cotton, wool, silk, and nylon, offering good wash and light fastness.
• Inkjet and Printing Inks: A key component in the production of pigments for high-quality inks, providing excellent color strength and stability.
• Liquid Crystal Display (LCD) Color Filters: Potential application in the manufacture of colorants for electronic display technologies.
• Biological Staining: May be utilized in the development of histological stains for microscopy due to its chromophoric structure.
• Research & Development: Employed in chemical research for studying azo coupling reactions and developing novel chromophores.

Basic Information

Product Name	2,7-Naphthalenedisulfonic Acid, 4-[[3-[(3-Amino-4-Nitrophenyl) Azo]-2,4-Dihydroxyphenyl]Azo]-5-Hydroxy-, Disodium Salt
CAS No.	72894-23-6
Molecular Formula	C22H14N6Na2O12S2
Molecular Weight	672.48 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 4-[[3-[(3-amino-4-nitrophenyl)azo]-2,4-dihydroxyphenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonate; 4-[[3-[(3-Amino-4-nitrophenyl)azo]-2,4-dihydroxyphenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid disodium salt; C.I. Acid Black 210; Azo Black Dye Intermediate; 2,7-NDSA derivative
EINECS	Contact for details

Quality Control

Our production of 2,7-Naphthalenedisulfonic Acid, 4-[[3-[(3-Amino-4-Nitrophenyl) Azo]-2,4-Dihydroxyphenyl]Azo]-5-Hydroxy-, Disodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) detailing all critical parameters are provided with each shipment to guarantee traceability and consistency for your manufacturing processes.

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). This product is hygroscopic (moisture-sensitive) and must be kept in a dry environment to prevent caking and decomposition. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content (KF)	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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