Description

7-[[3-Methoxy-4-[[[[2-Methoxy-4-[(3-Sulfophenyl)Azo]Phenyl]Amino]Carbonyl]Amino]Phenyl]Azo]-1,3-Naphthalenedisulfonic Acid is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulfonic acid groups, makes it a critical precursor for producing vivid and stable colorants. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries who require consistent quality and reliable supply chains for their production processes.

Application

• Primary Intermediate for Reactive Dyes: Serves as a key building block in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Textile Colorant Production: Used in manufacturing dyes that offer excellent wash-fastness and light-fastness properties for the textile industry.
• Inkjet and Printing Inks: Acts as a precursor for pigments and dyes used in high-quality digital printing and industrial inks.
• Specialty Coatings and Paints: Employed in the development of colorants for coatings requiring specific chromaticity and durability.
• Leather and Paper Dyeing: Utilized in the production of dyes for coloring leather goods and specialty papers.
• Research and Development: Serves as a standard or experimental compound in R&D labs for developing new colorant technologies and studying azo chemistry.

Basic Information

Product Name	7-[[3-Methoxy-4-[[[[2-Methoxy-4-[(3-Sulfophenyl)Azo]Phenyl]Amino]Carbonyl]Amino]Phenyl]Azo]-1,3-Naphthalenedisulfonic Acid
CAS No.	73297-07-1
Molecular Formula	C31H24N6O11S3
Molecular Weight	768.75 g/mol
Synonyms	Acid Red 337; C.I. 17200; 1,3-Naphthalenedisulfonic acid, 7-[[3-methoxy-4-[[[[2-methoxy-4-[(3-sulfophenyl)azo]phenyl]amino]carbonyl]amino]phenyl]azo]-; Reactive Red Dye Intermediate; Azo Dye Intermediate 73297-07-1; Benzenesulfonic acid, 2-methoxy-5-[[4-[[2-(3,6-disulfo-7-naphthalenyl)diazenyl]-2-methoxyphenyl]amino]carbonyl]amino]-; (Alternative IUPAC name)
EINECS	Contact for details

Quality Control

Our production of 7-[[3-Methoxy-4-[[[[2-Methoxy-4-[(3-Sulfophenyl)Azo]Phenyl]Amino]Carbonyl]Amino]Phenyl]Azo]-1,3-Naphthalenedisulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for use in sensitive dye synthesis. Certificates of Analysis (COA) documenting purity, impurity profile, and physical characteristics are provided to guarantee traceability and consistency for our B2B clients.

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). This compound is light-sensitive (store away from light) and hygroscopic (moisture-sensitive); therefore, containers must be kept sealed to prevent moisture absorption and degradation.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Typical 97-99%)
Moisture Content (KF)	≤ 5.0%
Ash Content	≤ 1.0%
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.