Description

Diphenylamine Sulfonic Acid is a versatile aromatic sulfonic acid derivative widely used as a key intermediate in the synthesis of dyes, pigments, and other fine chemicals. Its significance lies in its ability to introduce sulfonic acid groups into organic molecules, enhancing solubility and providing reactive sites for further chemical transformations. This compound is essential for manufacturers in the dye and pigment industry, as well as for research and development laboratories focusing on organic synthesis and material science.

Application

• Primary intermediate in the manufacture of acid dyes and azo pigments for textiles, inks, and plastics.
• Key building block for synthesizing sulfonated polymers and ion-exchange resins.
• Used in the production of corrosion inhibitors and lubricant additives.
• Intermediate for pharmaceutical and agrochemical active ingredients.
• Research chemical in organic synthesis and material science for developing new functional molecules.
• Potential use in the synthesis of electrolytes for battery applications.

Basic Information

Product Name	Diphenylamine Sulfonic Acid
CAS No.	101-57-5
Molecular Formula	C12H11NO3S
Molecular Weight	249.29 g/mol
Synonyms	4-Aminodiphenylamine-3-sulfonic Acid; N-Phenyl-1,4-phenylenediamine-2-sulfonic Acid; 4-Amino-4'-hydroxydiphenylamine-3-sulfonic Acid; Dapsone Intermediate; DASA; C.I. 37230; 1,4-Diaminobenzene-2-sulfonic Acid, N-Phenyl-; Benzenesulfonic acid, 4-amino-4'-hydroxy-1,1'-diphenyl-
EINECS	202-954-9

Quality Control

Our Diphenylamine Sulfonic Acid is produced under a stringent quality management system to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, impurity profile, and physical characteristics. Our quality commitment aligns with ISO standards, and we can support compliance requirements for global markets, including 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). Keep away from strong oxidizing agents, strong bases, and incompatible materials.

Specification

Item	Specification
Appearance	Light gray to brown powder or crystals
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
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.