Description

4-Aminobiphenyl-3-Sulfonic Acid is a specialized aromatic sulfonic acid derivative that serves as a critical intermediate in advanced organic synthesis. Its value lies in its bifunctional structure, featuring both an aromatic amine and a sulfonic acid group, which enables its use in creating complex molecules with specific properties. This compound is primarily needed by manufacturers in the pharmaceutical, agrochemical, and dye industries for the production of active ingredients and functional colorants.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of various active pharmaceutical ingredients (APIs), particularly those requiring a biphenyl sulfonate scaffold.
• Dye and Pigment Manufacturing: Used in the production of azo dyes and other high-performance colorants, where it contributes to color fastness and solubility.
• Agrochemical Synthesis: Serves as a precursor in the development of certain herbicides and fungicides, leveraging its aromatic structure.
• Research & Development: Employed in academic and industrial R&D labs for exploring new chemical entities and reaction pathways in medicinal chemistry.
• Liquid Crystal and Electronic Materials: Can be utilized as a starting material for synthesizing specialized monomers used in advanced material science applications.

Basic Information

Product Name	4-Aminobiphenyl-3-Sulfonic Acid
CAS No.	3365-88-6
Molecular Formula	C12H11NO3S
Molecular Weight	249.29 g/mol
Synonyms	3-Amino-4-phenylbenzenesulfonic Acid; 4-Phenyl-3-aminobenzenesulfonic Acid; [1,1'-Biphenyl]-3-sulfonic acid, 4-amino-; 4-Amino-1,1'-biphenyl-3-sulfonic Acid; 3-Sulfo-4-aminobiphenyl; 4-Amino-3-phenylbenzenesulfonic Acid; 4-Aminodiphenyl-3-sulfonic Acid
EINECS	222-150-7

Quality Control

Our 4-Aminobiphenyl-3-Sulfonic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation by IR and NMR spectroscopy, to ensure it meets precise customer specifications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment, and we support compliance with global regulatory frameworks such as REACH.

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 sealed to prevent absorption of atmospheric moisture. Keep away from strong acids and incompatible materials.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (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.