Description

m-[(p-Aminophenyl)Azo]Benzenesulphonic Acid is an azo dye intermediate characterized by its distinct aromatic amine and sulfonic acid functional groups. This compound is essential for synthesizing a range of azo dyes and pigments, providing the foundational chromophore structure. It is primarily required by manufacturers in the dye and pigment, textile, and specialty chemical industries for producing colorants with specific hue and fastness properties.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes, direct dyes, and other azo-based colorants.
• Textile Dyeing and Printing: Used in the production of dyes for coloring natural and synthetic fibers like wool, silk, and nylon.
• Pigment Manufacturing: Acts as a precursor in the creation of organic pigments used in inks, paints, and plastics.
• Laboratory Reagent: Employed in research and development for studying azo coupling reactions and dye chemistry.
• Specialty Chemical Synthesis: Utilized as an intermediate for more complex chemical products requiring a diazonium component.

Basic Information

Product Name	m-[(p-Aminophenyl)Azo]Benzenesulphonic Acid
CAS No.	102-23-8
Molecular Formula	C18H15N3O3S
Molecular Weight	353.39 g/mol
Synonyms	3-[(4-Aminophenyl)azo]benzenesulfonic acid; 4-Aminoazobenzene-3'-sulfonic acid; m-(p-Amino phenylazo) benzene sulfonic acid; C.I. 11160; Acid Orange 6 (unsulfonated component); Benzenesulfonic acid, m-[(p-aminophenyl)azo]-; 3-[(4-Aminophenyl)diazenyl]benzenesulfonic acid
EINECS	203-014-8

Quality Control

Our m-[(p-Aminophenyl)Azo]Benzenesulphonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay by HPLC and identification by spectroscopic methods, to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
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.