Description

Disodium 6-Amino-5-[(4-Chloro-5-Methyl-2-Sulphonatophenyl)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 specific, high-performance dyes and pigments, particularly in applications demanding color fastness and chemical stability. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid and durable colors.

Application

• Primary Intermediate for Dye Synthesis: Serves as a crucial building block in the production of acid dyes, direct dyes, and reactive dyes used for coloring nylon, wool, silk, and paper.
• Textile Industry: Used in the manufacture of dyes for textile fibers, providing excellent wash and light fastness properties in the final colored product.
• Ink Formulation: Acts as a colorant intermediate in the production of inks for various printing applications, including packaging and security inks.
• Specialty Pigments: Employed in the synthesis of lake pigments and other specialty colorants for plastics, coatings, and cosmetics.
• Research & Development: Utilized in chemical R&D for developing new chromophores and studying azo dye chemistry and properties.
• Biological Staining: Potential application as an intermediate for histological stains and indicators in laboratory settings.

Basic Information

Product Name	Disodium 6-Amino-5-[(4-Chloro-5-Methyl-2-Sulphonatophenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonate
CAS No.	94159-49-6
Molecular Formula	C17H12ClN3Na2O8S2
Molecular Weight	547.86 g/mol
Synonyms	6-Amino-5-[(4-chloro-5-methyl-2-sulfophenyl)azo]-4-hydroxy-2-naphthalenesulfonic acid, disodium salt; C.I. Acid Red 337; Disodium 6-amino-4-hydroxy-5-[(4-chloro-5-methyl-2-sulfophenyl)azo]-2-naphthalenesulfonate; Azo dye intermediate 94159-49-6; 5-[(4-Chloro-5-methyl-2-sulfophenyl)azo]-6-amino-4-hydroxy-2-naphthalenesulfonic acid disodium salt; 2-Naphthalenesulfonic acid, 6-amino-5-[(4-chloro-5-methyl-2-sulfophenyl)azo]-4-hydroxy-, disodium salt
EINECS	Contact for details

Quality Control

Our production of Disodium 6-Amino-5-[(4-Chloro-5-Methyl-2-Sulphonatophenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided with each shipment and are available upon request.

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 quality and handling properties.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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