Description

5-Acetylamino-4-Hydroxy-3-[[4-[[[2-(Sulfooxy)Ethyl]Sulfonyl]Methylamino]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple sulfonic acid groups and a reactive vinyl sulfone precursor, makes it a critical building block for synthesizing high-performance reactive dyes. This compound is essential for manufacturers in the textile and specialty chemical industries seeking to produce dyes with excellent wash-fastness, brilliant color, and strong covalent bonds to cellulosic fibers like cotton.

Application

• Primary Intermediate for Reactive Dyes: Serves as the key chromophore and reactive site precursor in the synthesis of high-quality reactive dyes for cotton, viscose, and other cellulose-based textiles.
• Textile Dyeing and Printing: Used in the formulation of dyes for exhaust, pad-batch, and continuous dyeing processes, providing vibrant and durable colors.
• Specialty Chemical Synthesis: Acts as a versatile intermediate for creating complex, sulfonated azo compounds used in research and advanced material development.
• Biomolecular Staining: Potential application as a precursor for developing staining agents in biological and histological research due to its chromophoric properties.
• Ink Manufacturing: Can be utilized in the production of specialized inks where water solubility and color strength are required.

Basic Information

Product Name	5-Acetylamino-4-Hydroxy-3-[[4-[[[2-(Sulfooxy)Ethyl]Sulfonyl]Methylamino]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid
CAS No.	3743-84-8
Molecular Formula	C21H21N5O14S4
Molecular Weight	703.67 g/mol
Synonyms	5-Acetamido-4-hydroxy-3-((4-((2-(sulfooxy)ethyl)sulfonyl)methylamino)phenyl)azo)-2,7-naphthalenedisulfonic acid; Reactive Dye Intermediate; C.I. Reactive Red 198 intermediate; Vinylsulfone dye precursor; 2,7-Naphthalenedisulfonic acid, 5-(acetylamino)-4-hydroxy-3-((4-(((2-(sulfooxy)ethyl)sulfonyl)methylamino)phenyl)azo)-; Azo dye intermediate, sulfonated; Acid Black 210 intermediate (related)
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive analytical testing including HPLC for purity, spectrophotometry for strength, and titration for functional group analysis. A Certificate of Analysis (COA) detailing purity, assay, and impurity profile is provided with every 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, 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)	Min. 95%
Purity (HPLC Area %)	Min. 98.0%
Water Content (KF)	Max. 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	Max. 20 ppm

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