Description

Sodium 6-Amino-5-[[3-[[(2-Ethylphenyl)Amino]Sulphonyl]-4-Methylphenyl]Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. This compound matters for manufacturers requiring precise and consistent chromophore synthesis to achieve specific shades and performance characteristics in demanding applications. It is primarily needed by producers of dyes and pigments for textiles, inks, and specialty coatings who prioritize supply chain reliability and stringent quality control.

Application

• Primary Intermediate for Azo Dyes: Key building block in the synthesis of high-performance red and orange azo dyes for textile dyeing and printing.
• Pigment Manufacturing: Used in the production of organic pigments for inks, including packaging and publication inks, requiring excellent color strength.
• Specialty Coatings: Employed in formulating colorants for industrial and automotive coatings where lightfastness and chemical resistance are critical.
• Plastics and Polymers: Suitable for coloring certain engineering plastics and synthetic fibers during the polymerization or masterbatch process.
• Research & Development: Serves as a valuable chemical entity in R&D labs for developing novel chromophores and studying dye-sensitized systems.
• Leather Dyeing: Used in the formulation of dyes for leather finishing, providing deep, uniform coloration.

Basic Information

Product Name	Sodium 6-Amino-5-[[3-[[(2-Ethylphenyl)Amino]Sulphonyl]-4-Methylphenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	97358-57-1
Molecular Formula	C31H26N5NaO5S2
Molecular Weight	635.68 g/mol
Synonyms	6-Amino-5-[[3-[[(2-ethylphenyl)amino]sulfonyl]-4-methylphenyl]azo]-2-naphthalenesulfonic acid sodium salt; C.I. Acid Red 337; Sodium 6-amino-5-[(3-((2-ethylphenyl)aminosulfonyl)-4-methylphenyl)azo]naphthalene-2-sulfonate; Azo dye intermediate RED 337; 2-Naphthalenesulfonic acid, 6-amino-5-[[3-[[(2-ethylphenyl)amino]sulfonyl]-4-methylphenyl]azo]-, sodium salt; Acid Red 337 sodium salt; 97358-57-1
EINECS	Contact for details

Quality Control

Our Sodium 6-Amino-5-[[3-[[(2-Ethylphenyl)Amino]Sulphonyl]-4-Methylphenyl]Azo]Naphthalene-2-Sulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color strength, and impurity profiles. Certificates of Analysis (COA) detailing results from HPLC, spectrophotometry, and other relevant tests 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF Titration)	≤ 5.0%
Water Solubility	Freely soluble
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.