Description

4-Aminodiphenyamine-2-Sulfonic Acid is a key organic intermediate and dye precursor with the CAS registry number 91-30-5. This compound is valued for its role in synthesizing high-performance pigments and functional chemicals, offering reliable batch-to-batch consistency for industrial processes. It is primarily required by manufacturers in the dye and pigment, specialty chemical, and pharmaceutical intermediate sectors.

Application

• Primary intermediate in the synthesis of azo dyes and pigments.
• Key precursor for manufacturing hair dye components and colorants.
• Building block for specialty chemicals used in research and development.
• Intermediate in the production of photographic chemicals.
• Used in the synthesis of certain pharmaceutical active ingredients.
• Raw material for creating functional polymers and advanced materials.

Basic Information

Product Name	4-Aminodiphenyamine-2-Sulfonic Acid
CAS No.	91-30-5
Molecular Formula	C12H12N2O3S
Molecular Weight	264.30 g/mol
Synonyms	4-Amino-2-sulfodiphenylamine; 4-ADPS; 4-Aminodiphenylamine-2-sulfonic Acid; 2-Sulfo-4-aminodiphenylamine; 4-Amino-2'-sulfodiphenylamine; 4-Aminodiphenylamine-o-sulfonic Acid; 4-ADPA-2-Sulfonic Acid; N-Phenyl-p-phenylenediamine-2-sulfonic Acid
EINECS	202-058-9

Quality Control

Our 4-Aminodiphenyamine-2-Sulfonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your quality requirements.

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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and stability.

Specification

Item	Specification
Appearance	Light brown to gray powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
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.