Description

3-[(4-Aminophenyl)Azo]-4-Chlorobenzenesulfonic Acid is an azo dye intermediate of significant commercial importance. Its value lies in its role as a versatile precursor for synthesizing a range of dyes and pigments, particularly those requiring specific color fastness and chemical stability. This compound is essential for manufacturers in the textile, leather, and specialty chemical industries seeking to produce high-performance colorants.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile coloring.
• Key building block in the production of leather dyes, offering good penetration and color yield.
• Used in the manufacture of paper colorants and inks for specialty printing applications.
• Intermediate for research and development of novel functional dyes with specific optical or chemical properties.
• Potential precursor in the synthesis of liquid crystal dyes and other advanced materials.

Basic Information

Product Name	3-[(4-Aminophenyl)Azo]-4-Chlorobenzenesulfonic Acid
CAS No.	71205-47-5
Molecular Formula	C12H10ClN3O3S
Molecular Weight	311.74 g/mol
Synonyms	4-Chloro-3-[(4-aminophenyl)azo]benzenesulfonic Acid; 4-Aminoazobenzene-4'-chloro-3'-sulfonic Acid; 3-[(4-Aminophenyl)diazenyl]-4-chlorobenzenesulfonic Acid; 4-Chloro-3-(4-amino-phenylazo)-benzenesulfonic Acid; C.I. Azoic Diazo Component 44; Azoic Diazo Component 44; 71205-47-5
EINECS	Contact for details

Quality Control

Our production of 3-[(4-Aminophenyl)Azo]-4-Chlorobenzenesulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability. The product undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to guarantee compliance with your technical requirements.

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 nature, the container must be kept tightly sealed to minimize exposure to 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%
Residue on Ignition	≤ 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.