Description

4-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-5-[(Phenylsulphonyl)Oxy]Naphthalene-2,7-Disulphonic Acid is a high-purity, specialized azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple sulphonic acid groups, makes it a critical precursor for synthesizing high-value, water-soluble dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid, stable colors with excellent fastness properties.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-performance reactive dyes used in cotton and cellulose fiber dyeing.
• Production of Acid Dyes: Used in the manufacture of acid dyes for coloring wool, silk, and nylon textiles.
• Specialty Ink Formulations: Serves as a precursor for pigments in high-quality printing inks, including for packaging and security applications.
• Functional Dye Synthesis: Intermediate for creating dyes with specific functional properties, such as those used in biological staining or laser applications.
• Research & Development: Used in chemical R&D for developing novel chromophores and studying azo dye chemistry and properties.

Basic Information

Product Name	4-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-5-[(Phenylsulphonyl)Oxy]Naphthalene-2,7-Disulphonic Acid
CAS No.	117-44-2
Molecular Formula	C24H20N4O9S3
Molecular Weight	604.62 g/mol
Synonyms	Acid Red 52 Intermediate; 2,7-Naphthalenedisulfonic acid, 4-[(4-amino-5-methoxy-2-methylphenyl)azo]-5-[(phenylsulfonyl)oxy]-; 4-[(4-Amino-5-methoxy-2-methylphenyl)azo]-5-(phenylsulfonyloxy)-2,7-naphthalenedisulfonic acid; C.I. 45100; Azo dye intermediate 117-44-2; 5-[(Phenylsulfonyl)oxy]-4-[(4-amino-5-methoxy-o-tolyl)azo]naphthalene-2,7-disulfonic acid
EINECS	204-202-6

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided with each shipment to guarantee traceability and consistency for your manufacturing processes.

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. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Purity (HPLC, Area%)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%

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