Description

4-[[4-[(4-Hydroxyphenyl)Amino]Phenyl]Amino]Benzenesulphonic Acid is a specialized aromatic amine sulfonic acid derivative, serving as a critical intermediate in advanced organic synthesis. Its molecular structure, featuring multiple aromatic rings linked by amine groups and a terminal sulfonic acid, makes it a valuable building block for creating complex functional molecules. This compound is primarily sought by manufacturers in the dye, pigment, and specialty chemical industries for developing high-performance materials.

Application

• Key intermediate in the synthesis of high-grade azo dyes and pigments, contributing to color fastness and stability.
• Building block for advanced functional polymers and resins requiring specific optical or electronic properties.
• Precursor in the development of liquid crystal materials and other specialty organic compounds.
• Used in research and development of pharmaceutical intermediates and active ingredients.
• Component in the formulation of corrosion inhibitors and specialty additives for industrial processes.
• Intermediate for analytical reagents and chemical sensors.

Basic Information

Product Name	4-[[4-[(4-Hydroxyphenyl)Amino]Phenyl]Amino]Benzenesulphonic Acid
CAS No.	6421-80-3
Molecular Formula	C18H16N2O4S
Molecular Weight	356.40 g/mol
Synonyms	4,4',4''-Triaminotriphenylmethane-3-sulfonic Acid; Benzenesulfonic acid, 4-[[4-[(4-hydroxyphenyl)amino]phenyl]amino]-; 4-[[4-[(4-Hydroxyphenyl)amino]phenyl]amino]benzenesulfonic acid; N,N'-Bis(4-aminophenyl)-4-hydroxy-1,3-benzenedisulfonamide (related structure); Tris(4-aminophenyl)methane sulfonic acid derivative; 6421-80-3; 4-[(4-[(4-Hydroxyphenyl)amino]phenyl)amino]benzenesulphonic acid
EINECS	Contact for details

Quality Control

Our production of 4-[[4-[(4-Hydroxyphenyl)Amino]Phenyl]Amino]Benzenesulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling. Certificates of Analysis (COA) detailing purity, identity, and specific test results are provided with every shipment 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Light yellow to brown powder
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.