Description

4-Phenylamino-4'-[(4-Methyl-3-Sodiosulfophenyl)Azo][1,1'-Azobisnaphthalene]-5-Sulfonic Acid Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex molecular structure provides excellent chromophoric properties, making it a critical precursor for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid and stable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-performance, water-soluble azo dyes for textiles and leather.
• Specialty Pigment Manufacturing: Used in the production of organic pigments for inks, including packaging and security inks, due to its color strength.
• Functional Dyes for Polymers: Employed in the coloration of plastics and synthetic fibers where specific lightfastness and thermal stability are required.
• Research & Development: Utilized in academic and industrial R&D labs for developing novel chromophores and studying dye-sensitized systems.
• Analytical Reagents: Can be used as a staining agent or colorimetric indicator in specific biochemical and analytical applications.

Basic Information

Product Name	4-Phenylamino-4'-[(4-Methyl-3-Sodiosulfophenyl)Azo][1,1'-Azobisnaphthalene]-5-Sulfonic Acid Sodium Salt
CAS No.	6655-88-5
Molecular Formula	C39H27N5Na2O7S2
Molecular Weight	803.76 g/mol
Synonyms	Acid Red 337; C.I. 17210; Sodium 4-[(E)-[4-[(E)-(4-anilinonaphthalen-1-yl)diazenyl]-2-methyl-5-sulfonatophenyl]diazenyl]naphthalene-1-sulfonate; 1-Naphthalenesulfonic acid, 4-((4-((4-anilino-1-naphthalenyl)azo)-2-methylphenyl)azo)-, sodium salt (1:2); Azo dye intermediate 6655-88-5; 4-Phenylamino-4'-(4-methyl-3-sulfophenylazo)-1,1'-azonaphthalene-5-sulfonic acid disodium salt
EINECS	229-679-6

Quality Control

Our production of 4-Phenylamino-4'-[(4-Methyl-3-Sodiosulfophenyl)Azo][1,1'-Azobisnaphthalene]-5-Sulfonic Acid Sodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) detailing batch-specific results are provided to guarantee traceability and quality assurance for your manufacturing 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). Keep away from incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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