Description

Sodium 6-Amino-5-[[3-[(Ethylphenylamino)Sulphonyl]-4-Methylphenyl]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, offering excellent color properties and stability. This compound is primarily needed by manufacturers in the textile, ink, and specialty chemical industries for producing colorants with tailored characteristics.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes and direct dyes for textile fibers like nylon, silk, and wool.
• Specialty Ink Formulations: Used in the production of colorants for inks in packaging, security printing, and digital applications.
• Pigment Manufacturing: Acts as a precursor for lake pigments and other organic pigments used in plastics and coatings.
• Research & Development: Employed in chemical R&D for developing novel chromophores and functional dyes with specific light-absorption properties.
• Biological Staining: Potential use as an intermediate for synthesizing stains used in histological and cytological applications.

Basic Information

Product Name	Sodium 6-Amino-5-[[3-[(Ethylphenylamino)Sulphonyl]-4-Methylphenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonate
CAS No.	71278-42-7
Molecular Formula	C25H22N5NaO6S2
Molecular Weight	575.59 g/mol
Synonyms	6-Amino-5-[[3-[(ethylphenylamino)sulfonyl]-4-methylphenyl]azo]-4-hydroxy-2-naphthalenesulfonic acid sodium salt; C.I. Acid Red 337; Sodium 6-amino-4-hydroxy-5-[[3-[(N-ethylphenylamino)sulfonyl]-4-methylphenyl]azo]-2-naphthalenesulfonate; 2-Naphthalenesulfonic acid, 6-amino-5-[[3-[(ethylphenylamino)sulfonyl]-4-methylphenyl]azo]-4-hydroxy-, monosodium salt; Acid Red 337; Azo dye intermediate 71278-42-7
EINECS	Contact for details

Quality Control

Our production of Sodium 6-Amino-5-[[3-[(Ethylphenylamino)Sulphonyl]-4-Methylphenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and batch-to-batch reliability. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and physical characteristics are available upon request to support your quality assurance processes.

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, 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%
Loss on Drying	≤ 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.