Description

3-[(4-Anilinophenyl)Azo]Benzenesulphonic Acid is a specialized azo dye intermediate characterized by its distinct chemical structure. This compound is valued for its role as a key precursor in the synthesis of high-performance dyes and pigments, offering excellent color properties and structural versatility. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and stable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes, direct dyes, and other azo-based colorants for textiles and leather.
• Pigment Manufacturing: Used in the production of organic pigments for inks, coatings, and plastics, providing strong color strength and good dispersion properties.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo coupling reactions.
• Specialty Chemical Synthesis: Acts as a functional intermediate in the synthesis of more complex chemical entities for niche applications.

Basic Information

Product Name	3-[(4-Anilinophenyl)Azo]Benzenesulphonic Acid
CAS No.	4005-68-9
Molecular Formula	C18H15N3O3S
Molecular Weight	353.40 g/mol
Synonyms	Benzenesulfonic acid, 3-[(4-aminophenyl)azo]-; 3-[(4-Aminophenyl)azo]benzenesulfonic acid; 4-Aminoazobenzene-3'-sulfonic acid; C.I. 11160; Acid Yellow 36 (Parent Acid); 3-[(4-Aminophenyl)azo]benzenesulphonic acid; 4-Aminoazobenzene-3'-sulphonic acid; 3-[(4-Anilinophenyl)azo]benzenesulfonic acid
EINECS	223-653-6

Quality Control

Our 3-[(4-Anilinophenyl)Azo]Benzenesulphonic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and physical characteristics are available upon request to support your quality assurance protocols.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
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.