Description

4-[[(4-Aminophenyl)Sulfonyl]Amino]Benzenesulfonic Acid Sodium Salt is a high-purity, functionalized aromatic sulfonate salt, valued for its dual sulfonamide and sulfonic acid functionalities which make it a versatile intermediate in advanced synthesis. This compound is critical for industries requiring precise chemical building blocks to develop specialized dyes, pharmaceutical actives, and high-performance materials. It is primarily sought by R&D laboratories and production facilities in the fine chemical, pharmaceutical, and specialty dye sectors for its reliable reactivity and purity.

Application

• Key intermediate in the synthesis of azo dyes and pigments, contributing to color fastness and solubility.
• Building block for pharmaceutical active ingredients (APIs), particularly in sulfonamide-based drug development.
• Precursor in the production of specialty surfactants and dispersants for industrial applications.
• Used in analytical chemistry as a reagent or standard for method development.
• Intermediate for polymer modification, introducing sulfonic acid groups to alter material properties.
• Component in research and development of novel organic compounds with specific ionic characteristics.

Basic Information

Product Name	4-[[(4-Aminophenyl)Sulfonyl]Amino]Benzenesulfonic Acid Sodium Salt
CAS No.	6267-27-2
Molecular Formula	C12H11N2O5S2Na
Molecular Weight	358.34 g/mol
Synonyms	Benzenesulfonic acid, 4-[[(4-aminophenyl)sulfonyl]amino]-, sodium salt (1:1); Sodium 4-((4-aminophenyl)sulfonamido)benzenesulfonate; 4-Aminophenylsulfonyl-4-aminobenzenesulfonic acid sodium salt; 4,4'-Diaminodiphenylsulfone-3,3'-disulfonic acid disodium salt (related form); Dapsone disulfonate sodium salt; DADPS disulfonate; CAS 6267-27-2
EINECS	Contact for details

Quality Control

Our 4-[[(4-Aminophenyl)Sulfonyl]Amino]Benzenesulfonic Acid Sodium Salt is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment, ensuring traceability and compliance for your regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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