Description

2-Chloro-5-[[4-(Phenylamino)Phenyl]Azo]Benzenesulfonic Acid is a specialized azo dye intermediate characterized by its sulfonic acid group and chlorinated aromatic structure. This compound matters for its role as a key precursor in synthesizing high-value, colorfast dyes and pigments, offering excellent binding properties and thermal stability. It is primarily needed by manufacturers in the textile, leather, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile coloring.
• Key component in the production of leather dyes, providing deep, uniform shades.
• Used in the formulation of inks for printing and packaging applications.
• Employed as a chemical intermediate in organic synthesis for more complex sulfonated compounds.
• Potential use in the research and development of functional dyes for non-textile applications.

Basic Information

Product Name	2-Chloro-5-[[4-(Phenylamino)Phenyl]Azo]Benzenesulfonic Acid
CAS No.	63216-91-1
Molecular Formula	C18H14ClN3O3S
Molecular Weight	387.84 g/mol
Synonyms	2-Chloro-5-[(4-anilinophenyl)azo]benzenesulfonic acid; Benzenesulfonic acid, 2-chloro-5-[[4-(phenylamino)phenyl]azo]-; C.I. Acid Orange 67 intermediate; Azo dye intermediate OA-67; 4-[(2-Chloro-5-sulfophenyl)azo]diphenylamine; 2-Chloro-5-(4-anilino phenylazo) benzene sulfonic acid
EINECS	Contact for details

Quality Control

Our 2-Chloro-5-[[4-(Phenylamino)Phenyl]Azo]Benzenesulfonic Acid undergoes rigorous quality testing to ensure compliance with industry standards for dye intermediates. Certificates of Analysis (COA) are available upon request, detailing purity, identity, and impurity profiles to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at 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.

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.