Description

8-[(4-Chlorophenyl)Azo]-5-[[4-[Ethyl[(3-Sulfophenyl)Methyl]Amino]Phenyl]Azo]Naphthalene-2-Sulphonic Acid is a high-purity, synthetic azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple azo linkages and sulfonic acid groups, provides excellent chromophoric properties and water solubility. This compound is primarily sought after by manufacturers in the specialty dyes and pigments industry for producing vivid, colorfast products, as well as by research institutions for advanced material science applications.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of high-performance, water-soluble azo dyes for textiles, inks, and coatings.
• Specialty Colorant Production: Used to manufacture specific shades of red, orange, and brown dyes with enhanced light and wash fastness properties.
• Functional Dyes for Non-Textile Applications: Potential use in the formulation of dyes for paper, leather, and food colorants (subject to regulatory approval and specific grade).
• Research & Development: Employed in academic and industrial R&D for studying azo compound chemistry, photochromism, and developing novel polymeric colorants.
• Analytical Chemistry Reagent: Can be utilized as a staining agent or a complexometric indicator in specific laboratory methodologies.

Basic Information

Product Name	8-[(4-Chlorophenyl)Azo]-5-[[4-[Ethyl[(3-Sulfophenyl)Methyl]Amino]Phenyl]Azo]Naphthalene-2-Sulphonic Acid
CAS No.	85977-48-6
Molecular Formula	C31H25ClN4O6S2
Molecular Weight	657.14 g/mol
Synonyms	Acid Red 337; C.I. 17215; 2-Naphthalenesulfonic acid, 8-[(4-chlorophenyl)azo]-5-[[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl]azo]-; 8-[(4-Chlorophenyl)diazenyl]-5-[[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl]diazenyl]naphthalene-2-sulfonic acid; Azo dye intermediate 85977-48-6; 5-[[4-[Ethyl[(3-sulfophenyl)methyl]amino]phenyl]azo]-8-[(4-chlorophenyl)azo]-2-naphthalenesulfonic acid
EINECS	Contact for details

Quality Control

Every batch of our 8-[(4-Chlorophenyl)Azo]-5-[[4-[Ethyl[(3-Sulfophenyl)Methyl]Amino]Phenyl]Azo]Naphthalene-2-Sulphonic Acid is manufactured under a strict quality management system. We employ advanced analytical techniques including HPLC, IR spectroscopy, and elemental analysis to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee it meets your specific technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. For long-term storage, consider inert gas purging to maintain product integrity.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Typical 97-99%)
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 1.0%
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.