Description

Sodium 3-[[4-Acetamidophenyl]Azo]-7-Amino-4-Hydroxynaphthalene-2-Sulphonate is a high-purity azo dye intermediate essential for producing vibrant and stable colorants. Its value lies in its precise molecular structure, which enables the synthesis of specialized dyes with excellent lightfastness and color strength for demanding applications. This compound is a critical raw material for manufacturers in the textile, ink, and specialty chemical industries seeking reliable, high-performance intermediates for their production processes.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes and direct dyes, particularly for coloring polyamide fibers like nylon and wool.
• Textile Industry: Used in the production of dyes for fabrics requiring bright shades and good wash-fastness properties.
• Ink Formulations: Employed in the manufacture of colorants for inks used in packaging, printing, and specialty marking applications.
• Leather Dyeing: Acts as an intermediate for dyes used in the leather tanning and finishing industry.
• Paper Coloring: Utilized in the synthesis of dyes for specialty paper products.
• Research & Development: Serves as a standard or reagent in chemical research for developing new chromophores and studying azo coupling reactions.
• Specialty Chemical Synthesis: Functions as a precursor for more complex dye molecules and functional colorants.

Basic Information

Product Name	Sodium 3-[[4-Acetamidophenyl]Azo]-7-Amino-4-Hydroxynaphthalene-2-Sulphonate
CAS No.	68201-76-3
Molecular Formula	C18H14N4NaO5S
Molecular Weight	421.38 g/mol
Synonyms	7-Amino-4-hydroxy-3-((4-(acetylamino)phenyl)azo)naphthalene-2-sulfonic acid sodium salt; C.I. Acid Orange 156; Sodium 7-amino-4-hydroxy-3-((4-acetamidophenyl)azo)naphthalene-2-sulfonate; 3-((4-Acetamidophenyl)azo)-7-amino-4-hydroxynaphthalene-2-sulfonic acid sodium salt; Azo dye intermediate 68201-76-3; Acid Orange 156 sodium salt; 4-Hydroxy-7-amino-3-((4-acetamidophenyl)azo)naphthalene-2-sulfonic acid sodium salt
EINECS	Contact for details

Quality Control

Our Sodium 3-[[4-Acetamidophenyl]Azo]-7-Amino-4-Hydroxynaphthalene-2-Sulphonate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and batch-to-batch reliability. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to support your quality assurance protocols.

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). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed when not in use to prevent degradation and moisture absorption.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Clear solution

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