Description

Trisodium 5-(Acetylamino)-3-[(4-Ethoxy-3-Sulphonatophenyl)Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a key precursor for synthesizing reactive and direct dyes, imparting vibrant and stable color properties to the final product. This compound is essential for manufacturers in the textile, leather, and specialty ink industries who require consistent quality and reliable supply for their dye production processes.

Application

• Primary Intermediate for Reactive Dyes: A crucial building block in the synthesis of high-quality reactive dyes used for coloring cotton, viscose, and other cellulosic fibers.
• Direct Dye Synthesis: Employed in the manufacture of direct dyes for applications on paper, leather, and textiles where high water solubility is advantageous.
• Specialty Ink Formulations: Used in the production of inks for jet printing and other specialty applications requiring specific chromatic properties and stability.
• Research & Development: Serves as a standard or experimental compound in R&D laboratories for developing new colorants and studying azo dye chemistry.
• Biological Staining: Potential use as a staining agent in histological and microbiological applications, owing to its specific chromophoric structure.

Basic Information

Item	Detail
Product Name	Trisodium 5-(Acetylamino)-3-[(4-Ethoxy-3-Sulphonatophenyl)Azo]-4-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	3321-13-9
Molecular Formula	C20H14N3Na3O13S3
Molecular Weight	677.48 g/mol
Synonyms	5-Acetamido-3-[(4-ethoxy-3-sulfophenyl)azo]-4-hydroxy-2,7-naphthalenedisulfonic acid trisodium salt; C.I. Reactive Red 120 intermediate; Trisodium 5-acetamido-4-hydroxy-3-[(4-ethoxy-3-sulfophenyl)azo]-2,7-naphthalenedisulfonate; Reactive Red 120 precursor; Azo dye intermediate 3321-13-9; 3-[(4-Ethoxy-3-sulfophenyl)azo]-4-hydroxy-5-acetamido-2,7-naphthalenedisulfonic acid trisodium salt
EINECS	Contact for details

Quality Control

Our production of Trisodium 5-(Acetylamino)-3-[(4-Ethoxy-3-Sulphonatophenyl)Azo]-4-Hydroxynaphthalene-2,7-Disulphonate 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. A Certificate of Analysis (COA) detailing all critical parameters is provided with each shipment to guarantee traceability and quality assurance for your manufacturing processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	Contact for details
Solubility	Freely soluble in water

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