Description

6-Amino-4-Hydroxy-5-[[4-[[[4-[(4-Hydroxyphenyl)Azo]Phenyl]Amino]Carbonyl]Phenyl]Azo]Naphthalene-2-Sulphonic Acid is a specialized, high-purity azo dye intermediate of significant commercial importance. Its complex molecular structure is engineered to provide excellent chromophoric properties and binding affinity, making it a critical precursor for advanced colorants. This compound is essential for manufacturers in the textile, ink, and specialty polymer industries seeking to develop high-performance, color-fast products.

Application

This advanced azo intermediate is utilized in the synthesis of high-value dyes and pigments across several key industries:

• Textile Dye Manufacturing: A key precursor for producing high-grade, wash-fast acid dyes and reactive dyes for nylon, wool, and silk.
• Inkjet and Printing Inks: Used in the synthesis of specialized pigments for high-resolution inks, offering superior color strength and stability.
• Functional Polymer Colorants: Incorporated into the production of colored polymers and plastics where consistent hue and thermal stability are required.
• Biological Staining Reagents: Serves as an intermediate for certain histological stains and indicators used in laboratory diagnostics.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo coupling reactions.

Basic Information

Product Name	6-Amino-4-Hydroxy-5-[[4-[[[4-[(4-Hydroxyphenyl)Azo]Phenyl]Amino]Carbonyl]Phenyl]Azo]Naphthalene-2-Sulphonic Acid
CAS No.	56670-24-7
Molecular Formula	C35H24N6O6S
Molecular Weight	656.67 g/mol
Synonyms	Acid Red 337 Intermediate; C.I. 17200 Intermediate; 6-Amino-4-hydroxy-2-naphthalenesulfonic acid, 5-[[4-[[[4-[(4-hydroxyphenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-; 5-[[4-[[[4-[(4-Hydroxyphenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-6-amino-4-hydroxy-2-naphthalenesulfonic acid; Azo Dye Intermediate 56670-24-7; 2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-[[4-[[[4-[(4-hydroxyphenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-
EINECS	Contact for details

Quality Control

Our production of this azo intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Every lot is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) detailing all relevant specifications are provided and available upon request to support your quality assurance and regulatory needs.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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