Description

Benzenesulfonic Acid, 4-(Acetylamino)-2-Amino-5-[[4-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-, Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing reactive and direct dyes, providing excellent color fastness and vibrant hues. It is primarily required by manufacturers in the textile, leather, and specialty ink industries for producing high-performance colorants.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of reactive dyes for cotton, wool, and nylon, offering strong covalent bonds with fibers.
• Direct Dye Production: Used in manufacturing direct dyes for paper, leather, and cellulosic textiles.
• Specialty Ink Formulations: Employed in the production of inks for jet printing and other high-resolution applications.
• Research & Development: Serves as a critical reagent in chemical R&D for developing novel chromophores and functional dyes.
• Biological Staining: Potential use as a precursor for histological stains and biological markers in laboratory settings.

Basic Information

Item	Details
Product Name	Benzenesulfonic Acid, 4-(Acetylamino)-2-Amino-5-[[4-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-, Disodium Salt
CAS No.	85765-41-9
Molecular Formula	C22H20N5Na2O11S3
Molecular Weight	679.58 g/mol
Synonyms	Reactive Black 5 Precursor; C.I. Reactive Black 5 Intermediate; Disodium 4-acetamido-2-amino-5-[4-[2-(sulfooxy)ethylsulfonyl]phenyl]azo]benzenesulfonate; 4-Acetamido-2-amino-5-[4-[2-(sulfooxy)ethylsulfonyl]phenyl]azo]benzenesulfonic Acid Disodium Salt; Azo Dye Intermediate RB5; Vinylsulfone Dye Intermediate; 85765-41-9; CAS 85765-41-9
EINECS	Contact for details

Quality Control

Our Benzenesulfonic Acid, 4-(Acetylamino)-2-Amino-5-[[4-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-, Disodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment.

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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect purity and performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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