Description

3-Amino-4-(p-Aminoanilino)Benzenesulphonic Acid is a high-purity, specialized aromatic sulfonic acid derivative that serves as a critical intermediate in advanced organic synthesis. Its unique bifunctional structure, containing both amino and sulfonic acid groups, makes it an essential building block for creating complex molecules with specific functional properties. This compound is primarily utilized by manufacturers in the dye and pigment, pharmaceutical, and agrochemical industries for the development of high-value, performance-driven products.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of high-performance azo dyes, acid dyes, and reactive dyes, contributing to color fastness and brilliance.
• Pharmaceutical Synthesis: Used as a versatile building block in the research and production of active pharmaceutical ingredients (APIs), particularly those requiring sulfonamide or aniline-based structures.
• Agrochemical Manufacturing: Employed in the synthesis of specialized herbicides, fungicides, and plant growth regulators where its aromatic amine functionality is crucial.
• Chemical Research & Development: Serves as a valuable reagent in academic and industrial R&D for exploring new organic reactions and creating novel polymeric materials.
• Photographic Chemicals: Can be utilized in the formulation of certain color-developing agents and sensitizers for photographic films and papers.
• Corrosion Inhibitor Formulation: Acts as a component in specialty formulations designed to protect metals in industrial processes.

Basic Information

Product Name	3-Amino-4-(p-Aminoanilino)Benzenesulphonic Acid
CAS No.	97-34-7
Molecular Formula	C₁₂H₁₃N₃O₃S
Molecular Weight	279.32 g/mol
Synonyms	3-Amino-4-(4-aminophenylamino)benzenesulfonic acid; 4,4'-Diaminodiphenylamine-2-sulfonic Acid; 2-Sulfo-4,4'-diaminodiphenylamine; C.I. 37245; 1,4-Benzenediamine, N1-(2-amino-5-sulfophenyl)-; 4-Amino-4'-aminodiphenylamine-2-sulfonic Acid; DAPSA; 97-34-7
EINECS	202-579-8

Quality Control

Our 3-Amino-4-(p-Aminoanilino)Benzenesulphonic Acid is manufactured under a stringent quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, related substances, and residual solvents. We are committed to consistent quality and supply chain reliability for our global B2B partners.

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 product is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect stability and handling properties. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Light brown to grayish powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Heavy Metals	≤ 20 ppm

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