Description

3-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-4-Methoxybenzenesulphonic Acid is a specialized azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing high-performance dyes and pigments, offering excellent color properties and structural stability. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Key intermediate in the synthesis of azo dyes and pigments for textiles and fabrics.
• Used in the production of colorants for inks, including printing and writing inks.
• Employed in the manufacture of specialty pigments for coatings and plastics.
• Acts as a precursor for research chemicals and analytical reagents in laboratory settings.
• Potential use in the development of functional dyes for non-textile applications.

Basic Information

Product Name	3-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-4-Methoxybenzenesulphonic Acid
CAS No.	74173-53-8
Molecular Formula	C16H18N4O5S
Molecular Weight	378.40 g/mol
Synonyms	4-Methoxy-3-[(4-amino-5-methoxy-2-methylphenyl)azo]benzenesulfonic acid; 3-[(4-Amino-5-methoxy-2-methylphenyl)azo]-4-methoxybenzenesulfonic acid; Benzenesulfonic acid, 3-[(4-amino-5-methoxy-2-methylphenyl)azo]-4-methoxy-; Azo dye intermediate 74173-53-8; 4-Amino-5-methoxy-o-tolyl azo methoxybenzenesulphonic acid
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. We implement strict in-process controls and final batch analysis to guarantee the identity, purity, and consistency of this azo intermediate. Certificates of Analysis (COA) are available upon request, detailing all relevant specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Powder or crystalline solid
Color	Characteristic color (e.g., reddish-brown)
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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