Description

5-Amino-2-(4-Aminoanilino)Benzenesulphonic Acid Monohydrochloride is a high-purity, specialized aromatic amine derivative and sulfonic acid salt that serves as a critical intermediate in advanced chemical synthesis. Its value lies in its bifunctional structure, containing both primary aromatic amine groups and a sulfonic acid moiety, enabling its use in the production of complex, high-value molecules. This compound is essential for manufacturers in the pharmaceutical and specialty dye industries seeking reliable, high-quality building blocks for research and production.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a sulfonated aromatic amine structure.
• Dye and Pigment Synthesis: Serves as a crucial precursor for manufacturing azo dyes, acid dyes, and other complex colorants, contributing to color fastness and solubility.
• Chemical Research & Development: Used in organic synthesis laboratories for developing novel compounds, ligands, and functional materials.
• Specialty Chemical Production: Employed in the manufacture of corrosion inhibitors, photographic chemicals, and other performance chemicals.

Basic Information

Product Name	5-Amino-2-(4-Aminoanilino)Benzenesulphonic Acid Monohydrochloride
CAS No.	83732-64-3
Molecular Formula	C12H14N3O3S·HCl
Molecular Weight	316.78 g/mol
Synonyms	5-Amino-2-[(4-aminophenyl)amino]benzenesulfonic acid hydrochloride; 2,5-Diaminobenzenesulfonic acid, N-(4-aminophenyl)-, monohydrochloride; 4,4'-Diaminodiphenylamine-2-sulfonic acid hydrochloride; Benzenesulfonic acid, 5-amino-2-[(4-aminophenyl)amino]-, monohydrochloride; C.I. 37240; Diaphenyl Brown S; Intermediate for Acid Black 210
EINECS	Contact for details

Quality Control

Our 5-Amino-2-(4-Aminoanilino)Benzenesulphonic Acid Monohydrochloride is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide full traceability and Certificates of Analysis (COA) are available upon request, detailing all critical parameters to support your quality assurance and regulatory compliance needs.

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 after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Light gray to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
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.