Description

Disodium 6-Amino-5-[(4-Chloro-2-Sulphonatophenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonate 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 a range of vibrant and stable dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-performance colorants with specific fastness properties.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for coloring polyamide fibers like wool and nylon.
• Textile Industry: Used in the production of dyes that offer excellent wash and light fastness on natural and synthetic fabrics.
• Ink Manufacturing: Employed in the formulation of specialty inks, including those for inkjet and packaging applications, where color consistency and stability are paramount.
• Pigment Production: Acts as a starting material for creating lake pigments and other insoluble colorants used in plastics and coatings.
• Research & Development: Utilized in chemical research for developing novel chromophores and studying azo coupling reactions.
• Leather Dyeing: Applied in the synthesis of dyes suitable for the leather tanning and finishing industry.
• Paper Coloring: Used in the manufacture of dyes for specialty paper products.

Basic Information

Item	Details
Product Name	Disodium 6-Amino-5-[(4-Chloro-2-Sulphonatophenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonate
CAS No.	85188-11-0
Molecular Formula	C16H9ClN3Na2O8S2
Molecular Weight	516.82 g/mol
Synonyms	6-Amino-5-[(4-chloro-2-sulfophenyl)azo]-4-hydroxy-2-naphthalenesulfonic acid, disodium salt; C.I. Acid Red 337; Disodium 6-amino-4-hydroxy-5-[(4-chloro-2-sulfonatophenyl)azo]-2-naphthalenesulfonate; Acid Red 337; Azo dye intermediate RED 337; 85188-11-0; 6-Amino-4-hydroxy-5-[(4-chloro-2-sulfophenyl)azo]-2-naphthalenesulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 6-Amino-5-[(4-Chloro-2-Sulphonatophenyl)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 synthesis. Certificates of Analysis (COA) documenting batch-specific results 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 room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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