Description

Disodium 7-(Acetylamino)-3-[[4-[(4-Chloro-2-Sulphonatophenyl)Azo]-2,5-Dimethylphenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing vibrant and stable dyes and pigments, particularly in the red to violet color spectrum. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants with excellent fastness properties.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical building block in the synthesis of acid, direct, and reactive dyes, especially for coloring polyamide fibers like nylon and wool.
• Textile Dyeing and Printing: Used to produce dyes that offer excellent wash and light fastness on natural and synthetic fabrics.
• Ink Manufacturing: A key component in formulating inks for jet printing, packaging, and security applications requiring specific chromatic properties.
• Specialty Pigments: Employed in the production of high-performance pigments for plastics, coatings, and artistic materials.
• Biological Staining: Potential use as a precursor for histological stains in laboratory and diagnostic applications.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo dye chemistry and photostability.

Basic Information

Item	Detail
Product Name	Disodium 7-(Acetylamino)-3-[[4-[(4-Chloro-2-Sulphonatophenyl)Azo]-2,5-Dimethylphenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonate
CAS No.	5873-19-8
Molecular Formula	C32H24ClN5Na2O9S2
Molecular Weight	776.18 g/mol
Synonyms	Acid Red 337; C.I. 17210; Disodium 7-acetamido-3-[[4-[(4-chloro-2-sulfophenyl)azo]-2,5-dimethylphenyl]azo]-4-hydroxy-2-naphthalenesulfonate; 7-Acetamido-3-[[4-[(4-chloro-2-sulfophenyl)azo]-2,5-dimethylphenyl]azo]-4-hydroxy-2-naphthalenesulfonic acid disodium salt; Azo Dye Intermediate 5873-19-8; C.I. Acid Red 337; 2-Naphthalenesulfonic acid, 7-(acetylamino)-3-[[4-[(4-chloro-2-sulfophenyl)azo]-2,5-dimethylphenyl]azo]-4-hydroxy-, disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 7-(Acetylamino)-3-[[4-[(4-Chloro-2-Sulphonatophenyl)Azo]-2,5-Dimethylphenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonate 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 specifications for dye intermediate applications. Certificates of Analysis (COA) documenting purity, heavy metal content, and other critical parameters are available upon request 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark red to violet powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0

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