Description

4,4'-Diamino[1,1'-Biphenyl]-3-Sulphonic Acid is a high-purity, sulfonated biphenyl derivative essential as a key intermediate in advanced chemical synthesis. Its bifunctional amino and sulfonic acid groups make it a versatile building block for creating complex molecules with specific properties. This compound is primarily sought after by manufacturers in the pharmaceutical, agrochemical, and specialty dye industries for the development of active ingredients and functional colorants.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of novel drug candidates, particularly for creating sulfonamide-based therapeutics and diagnostic agents.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators where the sulfonic acid group enhances solubility and bioavailability.
• Dye and Pigment Manufacturing: Serves as a key intermediate for azo dyes and other high-performance colorants, providing excellent lightfastness and color strength.
• Polymer Modification: Employed to introduce sulfonic acid functionality into polymers, improving characteristics like hydrophilicity, ion-exchange capacity, or dyeability.
• Liquid Crystal & OLED Materials: Acts as a building block for sulfonated aromatic components used in electronic display technologies.
• Chemical Research & Development: Utilized in academic and industrial R&D labs for exploring new synthetic pathways and material science applications.

Basic Information

Product Name	4,4'-Diamino[1,1'-Biphenyl]-3-Sulphonic Acid
CAS No.	2051-89-0
Molecular Formula	C12H12N2O3S
Molecular Weight	264.30 g/mol
Synonyms	3-Sulfo-4,4'-diaminobiphenyl; Biphenyl-4,4'-diamine-3-sulfonic acid; 4,4'-Diaminobiphenyl-3-sulfonic acid; 3-Sulfobenzidine; 4-Amino-4'-(3-sulfophenylamino)biphenyl; [1,1'-Biphenyl]-4,4'-diamine, 3-sulfo-; C.I. 37240
EINECS	218-149-5

Quality Control

Our 4,4'-Diamino[1,1'-Biphenyl]-3-Sulphonic Acid is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for use in sensitive applications like pharmaceutical synthesis. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light 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
Related Substances (HPLC)	Individual impurity ≤ 0.5%, Total impurities ≤ 2.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.