Description

5-Amino-2-[(3-Amino-4-Methylphenyl)Amino]Benzenesulfonic Acid is a high-purity aromatic sulfonic acid derivative that serves as a critical intermediate in the synthesis of complex organic molecules. Its bifunctional amino and sulfonic acid groups make it a versatile building block for creating dyes, pigments, and specialty polymers with enhanced properties. This compound is essential for manufacturers in the fine chemical, dye, and pharmaceutical intermediate sectors seeking reliable, high-quality raw materials for advanced synthesis.

Application

• Primary Intermediate for Dyes and Pigments: A key precursor in the synthesis of azo dyes, acid dyes, and other complex colorants, particularly for textiles and inks.
• Pharmaceutical Intermediate: Used in the research and development of active pharmaceutical ingredients (APIs) and other bioactive molecules.
• Fine Chemical Synthesis: Serves as a versatile building block for creating specialty chemicals, including liquid crystal materials and photographic chemicals.
• Polymer Modification: Can be incorporated into polymer chains to introduce sulfonic acid groups, modifying properties like solubility or ionic character.
• Research & Development: Utilized in academic and industrial R&D laboratories for novel organic synthesis and material science projects.
• Corrosion Inhibitor Formulation: Potential use as a component in specialty formulations for metal surface treatment and protection.

Basic Information

Product Name	5-Amino-2-[(3-Amino-4-Methylphenyl)Amino]Benzenesulfonic Acid
CAS No.	6369-57-9
Molecular Formula	C13H15N3O3S
Molecular Weight	293.34 g/mol
Synonyms	4,4'-Diamino-2'-methyl-2-sulfodiphenylamine; 2,2'-Diamino-5-methyl-4-sulfodiphenylamine; 5-Amino-2-[(3-amino-4-methylphenyl)amino]benzenesulfonic acid; Benzenesulfonic acid, 5-amino-2-[(3-amino-4-methylphenyl)amino]-; 4-Amino-4'-amino-2'-methyl-2-sulfodiphenylamine; 2-Amino-5-methyl-4'-sulfodiphenylamine; C.I. 37235; Intermediate for Acid Dyes
EINECS	228-896-1

Quality Control

Our 5-Amino-2-[(3-Amino-4-Methylphenyl)Amino]Benzenesulfonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for use in sensitive applications like dye and pharmaceutical synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Light brown to gray powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility	Soluble in alkaline aqueous solutions; slightly soluble in water

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